View Full Version : Pressure Reading

Carpenter 409
02-23-2014, 6:06 AM
When you buy a rifle it's built/designed to hold a certain chamber pressure when a round is discharged. How do you know what that is, do they list it anyplace. I took a reloading class yesterday and all this talk of chamber pressure made me curious.

04-13-2014, 7:11 PM
SAAMI (http://www.saami.org/specifications_and_information/index.cfm)
Most reloading manuals list safe pressure ranges, too. Now that you have taken a basic class, go but a few reloading manuals. Hornady has a really nice explanation complete with pictures in their manual. It will help you to understand better what variables in reloading can change pressures.

04-13-2014, 9:23 PM
Load to within specs and then adjust from there, but you'll have to learn about pressure signs if you want to deviate from the SAAMI specs safely. Some key ones:

- heavy bolt lift or "sticky bolt"

- flattened or cratered primers

- ejector marks on the brass

04-15-2014, 8:54 PM
You should jump over to the reloading forum. Great advice in there and you'll probably get more responses