No, that'll be fine. Being a newbie you may get a fork hit with a gap that size but it's safe.
Sent from my SM-S906U1 using Tapatalk
Sent from my SM-S906U1 using Tapatalk
Ok thanksThe 9 mm steel ammo is a third of the width of your slingshot fork, and should thus not cause any issues whatsoever for an experienced shooter. The 8 mm band width should be alright if the flat band rubber has a thickness of at least 0.6 mm to handle the roughly 3 grams ammo weight of 9 mm steel with sufficient power.
If you are using bands with a lesser thickness with your mentioned band width, consider using 7 to 8 mm steel ammo for a more linear trajectory to the target, or cut wider tapered (say 30% taper) bands with the rubber you are using to shoot 9 mm steel.
The problem when starting out with slingshot shooting is the higher tendency to have fork (or finger) hits because of a variety of issues related to shooting techniques - namely bad pouch releases, non perpendicular (canted) holding of the slingshot frame (over-the-top sideways shooting), ammo not centered inside the pouch, non symmetrical flat bands or tubes, and the list goes on.
A wider inner fork width of 5 to 6 cm is more forgiving for new shooters with regard to the issues mentioned above. Inner fork widths of 4 cm and less, (common for Chinese-made slingshots) are best left aside until one has acquired a safe and consistent shooting technique. I'm speaking from personal experience.