Question 1: Which rifling can handle 45 grain varmint ammunition?
Suggestion 1: Also, a lot of ranges in my area ban the use of tracer. Tracer happens to be cheaper than standard ball ammunition; thus LZ should pay attention.
1:9 is the mininum i think. modernized ammo jackets can handled the "faster" spin rate so they don't easily come apart. From what I heard 1:9 is also enough to stabilize lighter bullets.
but you don't want 1:9 in your ar unless you absolutely want to shoot everything with just one gun.
Question:
My understanding is that 'slow' twist cannot properly stabilize heavy bullets as there is not enough angular momentum to be produced on bullet through its path in barrel. However, for light bullet (45 grain) etc, is there any problem for it to go through a 'fast' twist? Is too much angular momentum a problem?