Post by 2nd Bat on Dec 15, 2013 16:15:09 GMT -5
years ago there was some science around safety and wound production for airsoft projectiles. It was determined that anything above 1 jouelle in power will break skn and one jouelle is roughly 300 FPS with .20 gram. This is the reason 1 jouelle remains the FPS restriction in many countries (For instances Japan). With BBs especially less then .25 the inertia drops off quickly so most US major events settled on 378 FPS with .20 gram and 550 FPS for bolt action rifles with a minimum engagement range. This FPS has crept up to 400 FPS for most rifles with the proliferation of more powerful Chinese AEGs. with full face masks I have frankly little concern with reasonable FPS standards but have seen lots of nasty face wounds and lots and lots of chipped teeth which gets expensive and ugly.
what adds to the confusion is different weights and different size Bbs.
One of the challenges with 8mm heavy BBs is doing a jouelles conversion to insure the performance is on parr with acceptable safety standards. Obviously a 43 gram BB at 300 FPS is more destructive then a .20 gram BB at the same FPS. I am fine with 400 FPS equivalent for a .20 gram BB but anything above that gets to be pretty dicey. the inconsistency of shots from gas guns frankly is another concern although traditionally not an issue in winter for the most part. i hate hassling with Chronos at airsoft events and usually don't feel its necessary. (small events, close knit, responsible groups) but with this discussion about assorted exotic gasses wonder if it might not be a bad idea. What do you think is a safe FPS for a .34 or .43 gram BB? For that matter what do most people is appropriate for .20 gram?
what adds to the confusion is different weights and different size Bbs.
One of the challenges with 8mm heavy BBs is doing a jouelles conversion to insure the performance is on parr with acceptable safety standards. Obviously a 43 gram BB at 300 FPS is more destructive then a .20 gram BB at the same FPS. I am fine with 400 FPS equivalent for a .20 gram BB but anything above that gets to be pretty dicey. the inconsistency of shots from gas guns frankly is another concern although traditionally not an issue in winter for the most part. i hate hassling with Chronos at airsoft events and usually don't feel its necessary. (small events, close knit, responsible groups) but with this discussion about assorted exotic gasses wonder if it might not be a bad idea. What do you think is a safe FPS for a .34 or .43 gram BB? For that matter what do most people is appropriate for .20 gram?