Thread: Is it Pressure or Powder Capacity?

Originally Posted by tetawa

When you have a large case and small bore, result is throat erosion, 22-243 or 22-284 are other prime examples.

But you probably only know this based on the 22-243 or 22-284 at the usual 63,000-68,000 PSI SAMI pressure.

If you were to use a slower powder and get 50,000-55,000 PSI SAMI pressure, would the result still be fast throat erosion?

I suggest not.

Originally Posted by Hermitage

But you probably only know this based on the 22-243 or 22-284 at the usual 63,000-68,000 PSI SAMI pressure.

If you were to use a slower powder and get 50,000-55,000 PSI SAMI pressure, would the result still be fast throat erosion?

I suggest not.

Have always understood it's the amount of powder being burnt in comparison to caliber, have owned and used 25-06 and 257 Weatherby mag, throat erosion was there in both after 400 rounds, Weatherby worse. Found the 257 Roberts more to my liking, still did the job with less wear, the powder used was faster burning against what was used in the other two. This was 50 plus years ago and also think those 2 cartridges also accelerated my hearing loss.