[Konrad]

Posted for the benefit of anyone interest in the Flymars A Hunting Slingshot Rifle.

I made up a band set 50 to 20mm tapper, double bands. 1mm Sheshou guru and 0.65mm Therband gold and it shot a 93.4m/s (306.43fps) (19fpe) 19 foot pounds. This is a much better result.

So here are the results so far.

1) Sheshou guru 1mm 50 to 20mm tapper. 5:2 ratio

• 8mm steel 50/20mm tapper (113.2m/s) (371fps) 2.09 grams (32.27 grains)
• 8mm lead 50/20mm tapper (106.8m/s) (350fps) 3.04 grams (46.92 grains)
• 10mm lead 50/20mm tapper (74m/s) (242fps) 5.94 grams (91.63 grains)

2) Sheshou guru 1mm 50 to 12mm tapper. 4.2:1 ratio

• 8mm steel 50/12mm tapper (110.0m/s) (360fps) 2.09 grams (32.27 grains)
• 8mm lead 50/12mm tapper (101.3m/s) (331fps) 3.04 grams (46.92 grains)
• I didn't bother with the 10mm lead I guessed it would be under 70/ms

3) Sheshou guru 1mm + 0.65 Theraband gold 50 to 20mm tapper. 5:2 ratio (1.65mm of latex) arround 50lb's of draw force, see video below.

• 8mm steel 50/20mm tapper (104.0m/s) (342fps) 2.09 grams (32.27 grains)
• 8mm lead 50/20mm tapper (100.5m/s) (329fps) 3.04 grams (46.92 grains)
• 10mm lead 50/20mm tapper (93.4m/s) (306fps) 5.94 grams (91.63 grains)

So it seems the way to increase the effectiveness of the rifle is to go up in rubber and caliber not to try to get speed with a small projectile.

The inspiration for this was Jeorg Sprave's Sling-X-Bow with triple theraband gold bands (0.65x3=1.95mm). I am very happy about that. It looks like I might have nearly found the optimum performance for the Flymars A Hunting Slingshot Rifle.

A GZK MAD6 pouch die was used with GZK QINGYAO POUCH MATERIAL 1.8MM SCALY SUPER FIBER LEATHER, with Double sided laminated pouches. Thin strips of theraband gold used for tying in with wrap and tuck tying in method.

A link to a very handy ballistics calculator for download http://www.ctmuzzleloaders.com/ctml_experiments/rbballistics/rbballistics.html

Originally posted by NightKnight https://slingshotforum.com/topic/78-really-handy-round-ball-ballistics-calculator/

A older picture with 50/12mm tapper.

https://slingshotforum.com/gallery/image/41378-flymar-a-sheshou-guru1mm/

A link to a older post I did with all the goodies.

https://slingshotforum.com/topic/123738-questions-about-getting-max-perfomance-on-the-flymars-a-hunting-slingshot-rifle-with-12mm-lead/

Sorry I don't have a means to Video record at the moment. I don't want to waste your time with lies, I post for my benefit also in case I lose my records in the future.

Any observations and comments of a constructive manner are very welcome.

Salutations to all at slingshotforum.com.

 

[Konrad]

Flymars A Hunting Slingshot Rifle band performance. My records so far including Theraband gold.

Factory bands 1mm 50-20mm

• 
  
  8mm Steel (117.5m/s) (385fps)
  
  8mm lead (111.8 m/s) (366fps)
  
  10mm lead ?
  
  Theraband gold single 50-20mm
  

• 
  
  8mm Steel ?
  
  8mm lead (97m/s) (318fps)
  
  10mm lead ?
  
  Theraband gold double bands 50-20mm
  
• 
  
  8mm Steel ?
  
  8mm lead (104m/s) (341fps)
  
  10mm lead (74m/s) (242fps)
  

Sheshou guru 1mm 50-20mm (cold temps)*

• 
  
  8mm Steel (113.2m/s) (371fps)
  
  8mm lead (106.8m/s) (350fps) (12fpe)
  
  10mm lead (242fps) (74m/s)
  
  Sheshou guru 1mm 50 to 12mm tapper (cold temps)*
  

• 
  
  8mm Steel (110m/s) (360fps)
  
  8mm lead (101.3m/s) (331fps)
  
  10mm lead ?
  

Sheshou guru 1mm + 0.65 Theraband gold 50 to 20mm tapper (cold temps)*

• 
  
  8mm Steel (104m/s) (342fps)
  
  8mm lead (100.5m/s) (329fps)
  
  10mm lead (93.4m/s) (306fps) (19fpe)
  

(cold temps)* 12-18 degrees centigrade (cold morning) Sorry if I missed some calibers (No catch box). I tried pasting a table but no go. Salutations to all. PK

 

[robbo]

well done mate.

 

[Konrad]

Just a little update for me mates out there,

4)Sheshou guru 1mm 40 to 20mm tapper. 2:1 ratio
8mm steel 40/20mm tapper (108.2m/s) (354.99fps) 2.09 grams (32.27 grains) 9.03 foot-pounds
8mm lead 40/20mm tapper (95.1m/s) (315.62fps) 3.04 grams (46.92 grains) 10.38 foot-pounds

Factory bands.

 

[robbo]

Just a little update for me mates out there,

4)Sheshou guru 1mm 40 to 20mm tapper. 2:1 ratio
8mm steel 40/20mm tapper (108.2m/s) (354.99fps) 2.09 grams (32.27 grains) 9.03 foot-pounds
8mm lead 40/20mm tapper (95.1m/s) (315.62fps) 3.04 grams (46.92 grains) 10.38 foot-pounds

Factory bands.

hey Paul if you wacked the 10mm on the other end do you think it would pick the speed up a bit more,interested how many shots you get hope more than the 40 50 cheers

 

[Konrad]

Some more results mate 50-30mm tapper 3:2 slower.

Looks like too much rubber is slowing down the 8mm. I have GZK (0.65) I will try at 40 to 20mm and then I will try double Sheshou guru 1mm at 40-20mm for the 10 and 12mm lead I have.

5)Sheshou guru 1mm 50 to 30mm tapper. 3:2 ratio
8mm steel 50/30mm tapper (95.2m/s) (312.38fps) 2.09 grams (32.27 grains)
8mm steel 50/30mm tapper (97.7m/s) (320.54fps) 2.09 grams (32.27 grains)(excess cut off)

8mm lead 50/30mm tapper (91.5m/s) (300.2fps) 3.04 grams (46.92 grains)
8mm lead 50/30mm tapper (93.5m/s) (306.76fps) 3.04 grams (46.92 grains) (excess cut off)

I just duck back in the garage robbo and put these thru the chrony robbo.

10mm lead 50/30mm tapper (84.9m/s) (275.54fps)
12mm lead 50/30mm tapper (73.3m/s) (240.49fps)

Too much rubber for the 8mm not enough for the 10 and 12mm. The 12mm just fit, I need a new pouch die
https://slingshooting.com/slingshot-pouch-die/

Cheers PK

 

[robbo]

Some more results mate 50-30mm tapper 3:2 slower.

Looks like too much rubber is slowing down the 8mm. I have GZK (0.65) I will try at 40 to 20mm and then I will try double Sheshou guru 1mm at 40-20mm for the 10 and 12mm lead I have.

5)Sheshou guru 1mm 50 to 30mm tapper. 3:2 ratio
8mm steel 50/30mm tapper (95.2m/s) (312.38fps) 2.09 grams (32.27 grains)
8mm steel 50/30mm tapper (97.7m/s) (320.54fps) 2.09 grams (32.27 grains)(excess cut off)

8mm lead 50/30mm tapper (91.5m/s) (300.2fps) 3.04 grams (46.92 grains)
8mm lead 50/30mm tapper (93.5m/s) (306.76fps) 3.04 grams (46.92 grains) (excess cut off)

I just duck back in the garage robbo and put these thru the chrony robbo.

10mm lead 50/30mm tapper (84.9m/s) (275.54fps)
12mm lead 50/30mm tapper (73.3m/s) (240.49fps)

Too much rubber for the 8mm not enough for the 10 and 12mm. The 12mm just fit, I need a new pouch die
https://slingshooting.com/slingshot-pouch-die/

Cheers PK

this is harder than tuning a worn out carbie that cant breathe mate.i dont no toss a coin 40x30 might be worse or better mate this will do my head in lol mate, if worse comes to worse 50 shots at 350+fps 8mm lead thats smoken. well it is a rifle and a good one mate penertration over blunt force trauma might be the way, unless like the lotto the numbers come up and bingo 400 fps. i still reckon 40x30. if i had some 1mm id post it to you Paul where Australians we cant give up Aussie Aussie Aussie.

 

[Konrad]

I just went onto pyramid air and did the calculations of the 10mm 5.94 grams (91.36 grains) lead traveling at 84.9m/s (278.54fps) and it's Muzzle Energy = 15.74 foot-pounds. Not bad for all. 50/30mm tapper

https://www.pyramydair.com/widgets/convert.php?Units&u=14

That 40x30 might be it for the 8mm, or maybe what cattyshack hunter said is right too 1mm is too thick for 8mm.

We will see but nearly 16fpe is pretty good.

It is frustrating robbo but not as bad as that picatinny champ.

 

[robbo]

there are so many options mate,but if 1mm was to thick for the 8mm you think it would send the 10mm and 12 a bit faster, as you would think a lot of power not used in throwing the 8mm. i no the bloke from england said about .5 the specs and what i have been told by ibojoe and others is .5 precisegoing buy the specs i have read 50x25 but mate just keep writing down your figures keep trying different cuts if you want to that is.i have .5 precise here if you want me to post you some,other than that dont laugh but speargun tubes, im trying to pull a rabbit out of a hat mate .regards robbo

 

[Konrad]

Robbo mate I found the final piece in the jigsaw puzzle. Graphite powder. I had read it on Spraves web site that some one applied some to a slingshot rifle. Look at this picture.

Right paper, Groups on the right no powder on the pouch, left paper first three shots bottom left, scope adjustment stacking it.

Graphite Powder Lubricant

• Konrad
• Aug 9, 2020

Before and after grouping with Graphite Powder Lubricant applied to pouch at 10 yards, 3 shots...

https://www.supercheapauto.com.au/p/power-plus-power-plus-graphite-powder-lubricant-35g/1173.html

I might be a bugger with your rifle but the pouch material does not release evenly but with this dry lube it does.

Sorry, I will try this GZK first Thank you very much for the offer. If it fires like this I might not bother with the 8mm aye, 10mm will keep up the FPE 8mm will peel off.Good stuff. PK.

 

[robbo]

Robbo mate I found the final piece in the jigsaw puzzle. Graphite powder. I had read it on Spraves web site that some one applied some to a slingshot rifle. Look at this picture.

Right paper, Groups on the right no powder on the pouch, left paper first three shots bottom left, scope adjustment stacking it.

https://www.supercheapauto.com.au/p/power-plus-power-plus-graphite-powder-lubricant-35g/1173.html

I might be a bugger with your rifle but the pouch material does not release evenly but with this dry lube it does. Good stuff. PK

does this mean more speed as well as accuracy Paul how do you find this stuff mate im gonna call you macgyver for sure lol

 

[Konrad]

Just more accuracy. Slippery like lead pencil dust shavings. Mate I won't quit till I am about to tear my hair out, too much time and money spent. Found it on Jeorge spaves website theslingshotforum.com

I googled slingshot rifle accuracy and chased it down amongst the results, Same as the picatinny. Googled scope out of alignment fixes.

PK

Thank you slingshotforum.com for allowing this knowledge to be hosted here.

 

[robbo]

Just more accuracy. Slippery like lead pencil dust shavings. Mate I won't quit till I am about to tear my hair out, too much time and money spent. Found it on Jeorge spaves website theslingshotforum.com

I googled slingshot rifle accuracy and chased it down amongst the results, Same as the picatinny. Googled scope out of alignment fixes.

PK

Thank you slingshotforum.com for allowing this knowledge to be hosted here.

thats the go champ no quiting thats what they reckoned about the boys in new guinea all those years ago where resiliant mate through and through and excuse me i have drunk a tun of beer my friend and as maxwell smart would say. and loving it do you get a straight ammo flight i get roger federer forehands in hes prime rolling into the target thats with tubes though with flats straight as a die.i just wonder at 350fps can you see a 8mm steel ball regards robbo

 

[Konrad]

:lol:

Mate I gave up drinking a few year ago A shot of vodka in every beer. Whew too much.

I just did a calculation of the 12mm lead

12mm lead 50/30mm tapper (73.3m/s) (240.49fps) 10.22grams (157.72grains) 20.26fpe

20.26fpe I didn't realize It cracked the 20fpe. Oh boy. Take it easy mate. PK :thumbsup:

 

[robbo]

do you put the powder on the pouch or the stainless posts Paul

 

[Konrad]

Pouch mate. B)

 

[robbo]

yes the micro fibre pouches are smooth inside and a bit course on the outside, there good for a better grip.loading it like i do i make sure to keep the ammo centred for a good release .the pouches are made that way purposely Paul i could try turning them around if i have trouble, the smooth side is really smooth mate as long as they seat in properly it shoots straight as a dy mate.

 

[GregG]

Hey Paul, just joined the forum today and really glad I found your post! I have the same rifle and the same challenge. (trying to get the most speed/power out of it) so your posts are a real help. I hope you don't mind me asking you some questions from time to time since I'm a relative newbie to sling shoting as a whole. MY issue is I have a lot of ***** that rip up my lawn every night in the summer. I have about 5,000 sq feet of lawn that I'd like to convert into a mini golf course for the kids. Obviously the ***** have a different plan so I'd like to "dissuade" them from using my yard as their playground.

Don't want to kill them ... just hurt them enough to make them think twice about coming. For that reason I've been using 8mm clay balls which have some zing at 20 yards but I'd like some more wallop for up to 40 yards or so.

 

[Konrad]

Hello GregG,

No problem. If you have read the posts you can see there is a problem with leads and steel balls under the grade of G10. They rounds will start to curve like a baseball after 14 yards. I nearly quit and thought I wasted my money. Use a G100 grade steel. It is called the magnus effect.

There where lots of things to get this working perfectly. A Shim under the weaver rail, laminated pouches, wax infused graphite on the pouches, cuffed constrictor knots, 100% cotton builders chalk line for the band tie in. I bought this slingshot rifle a year a go and there are still some questions. What bands to use for peak performance for 8mm steel balls. I am using a 1mm Sheshou guru flatband at the moment.

I don't use tubes, I got the flat band upgrade. I don't know hardly a thing about tubes.

So yeah I am shooting a 8mm G100 grade steel ball at 109m/s 357.6fps (9.2fpe) (12.47 Joules) initial, 98.1m/s, 322fps (7.4fpe) (10.03 Joules) at 30 yards. My Scope is a Hawke VANTAGE 3-9x40 MIL DOT RETICLE Model: 14 121. I have been hitting a coke can at 46 yards. It punches thru the coke can and goes 8mm into a tree at 46 yards.

Thankyou Greg, A person like you is the reason I created this sort of online blog journal about the rifle, I could not find any info so I started to log what I was doing.

This was all I could find and made my heart sink:

https://slingshotforum.com/topic/114302-flymars-hunting-slingshot-rifle-double-safety-device-newest-slingshot-gun-terminator/

Salutations P.K

p.s. From what I have been seeing it is more accurate than a springer air rifle, last night I was zeroing in and getting 1 inch group at 16 yards.

 

[robbo]

Hey Paul, just joined the forum today and really glad I found your post! I have the same rifle and the same challenge. (trying to get the most speed/power out of it) so your posts are a real help. I hope you don't mind me asking you some questions from time to time since I'm a relative newbie to sling shoting as a whole. MY issue is I have a lot of ***** that rip up my lawn every night in the summer. I have about 5,000 sq feet of lawn that I'd like to convert into a mini golf course for the kids. Obviously the ***** have a different plan so I'd like to "dissuade" them from using my yard as their playground.

Don't want to kill them ... just hurt them enough to make them think twice about coming. For that reason I've been using 8mm clay balls which have some zing at 20 yards but I'd like some more wallop for up to 40 yards or so.

Paul nos his slingshot rifle stuff mate his attained legendary status in a very short time his an expert.