Thread: Is it Pressure or Powder Capacity?

Originally Posted by Hermitage

Yes "chamberings running the same pressure the smallest bore size will wear first", but I was meaning your statement of:



This is from Guns&Ammo Editorial:
https://www.gunsandammo.com/editoria...ls-life/326755

"The key ingredient here is high pressure, barrels don’t last as the pressure rises. There is no getting around this principle. Pressurized gas in the chamber blasts the throat. The throat, under extreme heat and pressure, rapidly moves between the solid and liquid phase. The bore melts a little bit from the heat and the pressure blasts the metal away.

In addition to SAAMI maximum pressure, the reloader must consider the cartridge’s case capacity. The powder in the case is the fuel that burns when the cartridge fires. More fuel means more heat. Heat is the second great enemy to barrel life and it’s nearly as bad as pressure."

Pressure is #1 with case capacity a close second by this article.

You are taking the article out of context, the heading is "extending a barrels life" and yes low loading will extend life, it wont make a under 1000rnd chambering last 20,000rnd.

The key factor is time and flow over area.
Or put more simply case to bore ratio.

You seem to have convinced yourself otherwise tho so you believe what you want to.