Ammo for an Ishapore

[J Tal]

I've put close to 500 rds in mine. Milsurp and factory loads do fine

[jmoore]

I've shot a "few" rounds through these as well, mostly at speed. NO DRAMAS! They were great fun when surplus ammo was 10 cents a round. I used 'em for fun demos of running house clearing exercises and "CQB" w/ a bolt gun.

Mr. Horton, here's a slight twist for you to ponder- These rifles mostly have chrome lined chambers. Generally industrial hard chrome has a lower C.o.F. than steel, don't remember quite how much right now... It seems that might incrementally increase bolt thrust forces a bit. (Unless you duct tape the case to the extractor first.)

[Edward Horton]

I've shot a "few" rounds through these as well, mostly at speed. NO DRAMAS! They were great fun when surplus ammo was 10 cents a round. I used 'em for fun demos of running house clearing exercises and "CQB" w/ a bolt gun.

Mr. Horton, here's a slight twist for you to ponder- These rifles mostly have chrome lined chambers. Generally industrial hard chrome has a lower C.o.F. than steel, don't remember quite how much right now... It seems that might incrementally increase bolt thrust forces a bit. (Unless you duct tape the case to the extractor first.)

For a rough military chamber with a 0.55 Coefficient of Friction the image below shows the case stretching and thinning where case head separations usually occurs.



POLISHED DRY CHAMBER.... This is the condition of dry brass and a polished chamber. The peak total load on the bolt face is 4720 pounds. The maximum effective plastic strain is only 0.02 in/in in the case wall where thinning usually occurs. There is very little thinning of the brass forward of the web.



Mine is not to reason why, I polish my chambers and keep them dry.

[jmoore]

So a 2A has a built in "wet" chamber. Oh, the horror!

I'll try and find some actual numbers later.