Pressure at Muzzle

[zrodwyo]

Can someone help me the variables that factor into the pressure at the muzzle in relation to stress put on a suppressor?

Clearly barrel length and charge weight are the biggest factors. What’s about bore diameter? Would a slow burning powder have more or less pressure at the muzzle on a short barrel?

I have some guesses based on common sense, but would rather know for sure.

 

[Chris in TN]

Powder burn rate, cartridge expansion ratio, bullet weight, barrel length....

It's complicated and I don't tend to worry about it at all beyond just staying well within the maker's recommendations.

FWIW you can download Gordon's Reloading Tool and use it to estimate muzzle pressures. Here's a graph. Note the dark orange spots I've circled. One is 'muzzle pressure'. The other is pressure at whatever point you slide your mouse pointer to. It's pretty intuitive to use.

 

[Dan Carey]

We've come a long ways in a short time.