Need some schooling, AR platform

[tigris99]

Ya there we go, moving that direction

My understanding is bullet weight, twist rate and velocity all effect how a bullet comes out. So would a fast burn or slow burn rate change velocity? So mess with things in the end.

There is a ton of science to this that I'm trying to grasp since ar platform is something insanely customizable with twist rates and so on. Trying to gain an understanding so I can figure out less wasteful starting points for tuning loads.

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[JeffreyDeGraff]

Ya there we go, moving that direction

My understanding is bullet weight, twist rate and velocity all effect how a bullet comes out. So would a fast burn or slow burn rate change velocity? So mess with things in the end.

There is a ton of science to this that I'm trying to grasp since ar platform is something insanely customizable with twist rates and so on. Trying to gain an understanding so I can figure out less wasteful starting points for tuning loads.

Sent from my SM-G781U using Tapatalk

Slower powders will push heavier bullets faster. You cannot fit enough of the slower burning powders in a case to get enough pressure to push lighter bullets faster. So you have to use a faster burning powder, which reaches pressure, with less, to get the higher velocities with lighter projectiles.


JTD