At our shop, we are one of the rare CATM ranges staffed by reservists rather than active duty personnel. Of course some students that come to our range feel offended that they are being taught by reservists (matter of fact, one of our instructors was critiqued that "they couldn't belive that they had to be taught by reservists"..freakin' bigot!) so we come up with a challenge for them. We are currently using M-193 out of rack grade M-16A2s at 25 meter targets. Air Force ranges aren't exaclty known for long range due mainly to available real estate. Well, if somebody has a problem with us teaching them, we'll take them out to the firing line with one of our instructors, each getting 20 rounds. We use 10 rounds for zeroing then we begin our competition. We set up 10 casings at the 25 meter line and you have 1 minute to see how many casings they can shoot. We haven't had an active duty shooter beat our guys yet!
All-in-all, you do loose a little accuracy using the lighter 55 grain bullets but nothing that significant that it really matters. You'll be just fine shooting 55 grain bullets through a 1:7 barrel.


) so we come up with a challenge for them. We are currently using M-193 out of rack grade M-16A2s at 25 meter targets. Air Force ranges aren't exaclty known for long range due mainly to available real estate. Well, if somebody has a problem with us teaching them, we'll take them out to the firing line with one of our instructors, each getting 20 rounds. We use 10 rounds for zeroing then we begin our competition. We set up 10 casings at the 25 meter line and you have 1 minute to see how many casings they can shoot. We haven't had an active duty shooter beat our guys yet!
All-in-all, you do loose a little accuracy using the lighter 55 grain bullets but nothing that significant that it really matters. You'll be just fine shooting 55 grain bullets through a 1:7 barrel.
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