Howdy,
For some reason I can't get my resized 7.65 argenting brass to chamber once the bullets are seated. It only happens in the cases I made out of 30-06 brass. They chamber fine before I seat the bullet, but once the bullet is seated, I just can't get the bolt to close without using a hammer,

You reckon it might be because the brass is so thich in the neck that the bullet pushed the neck so fat it won't go all the way down the chamber?

I hope I don't have to break down and buy one of them expensive 'neck peelers' from Sinclair. Maybe reaming the neck?

Maybe it's none of the above. I was kind of thinking about turning a few mils off of the bottom of the die, just to make the headspace minimal, but that sucker is heat treated, and I didn't want to ruin it.

Any thoughts would be helpful.

Mike

I am not an expert at making 7.65A out of 06 brass so don't expect miracles. How are you making these cases? Are you trimming them down to length or just sizing them in a F/L sizer die? A gunsmith told my brother, who has a 7.65, that he could cut down 06 brass and form them for his 7.65. Maybe you should use a caliper and measure the necks of some factory made brass that you have loaded (that will chamber in your rifle) and then measure the outside neck on one that won't chamber and compare them. That should give you an idea whether it this causing them not to chamber or whether the die isn't setting the shoulders back sufficiently. BTW, you can either grind the bottom of the sizing die or grind the top of the shell holder to give you more room to set the shoulder back if that is what is needed. I have ground the bottom of a sizer die for a 300WSM a little with a belt grinder once without any negative results, worked too.

I think with '06 brass being resized, too much of the thicker case body is being used. You might just have to inside neck ream them. But there is an easier way, use 8x57 brass. One pass thru the 7.65 sizer die, trim to length, and you should be good to go. That's what I do and I've never had a problem. Compare an '06 case to a 7.65 and an 8x57 to a 7.65 and I think you'll see what I'm talking about.

I've done this many times with military 30-06 with no problems. Are you sure you are trimming the case necks far enough? The Argy case has a short neck. After forming from 30-06 there is A LOT of extra neck to gt rid of. I went to lopping of most of the extra neck with a dremel tool (or you could use a trim die but I didn't want to spend the money).

You cases are too long. Mauser chambers are way oversize in the neck. I doubt it possible that you could ever find any case too thick. I have 3 Argentines. Two are M91s and one 1909. All 3 chamber necks measure .350 in diameter.

It's possible that you are buldging the case at the body shoulder junction if the bullet is giving you a lot of resistance when seating or it could buldge the case if compressing ball powder.

If the neck diameter with a bullet seated measures greater than .343" you may have a problem.A reasonable Max. dia. would be .340" roger

Another thought is it might be the bullet design,in the ogive and how long your throat is. I would take some machinist dykem and coat the shell completly and run it into your action,werever it takes the dykem off of the shell,youi,ll know what the problem is. vangunsmith

Still another posibility is that you are over crimping and buldging at the body to shoulder junction. roger

quote:

Originally posted by bartsche:
Still another posibility is that you are over crimping and buldging at the body to shoulder junction. roger

Been there, done that. It don't take much.

"They chamber fine before I seat the bullet but once the bullets are seated I can;t close the bolt without using a hammer"
I think your answer is in here somewhere.

Give Grafs a call, and order 100 Argie cases.

Prime, fill, seat and shoot.

Then, at your leisure, take a micrometer and calipers to you 30-06 conversion brass, measure all the pertinent dimensions, and compare the two types of loaded cases side by side.

LD

PS Rub magic marker all over one of your present cases, attempt to chamber it (not too hard) and see where it rubs off.

quote:

Originally posted by lawndart:
Give Grafs a call, and order 100 Argie cases.

Prime, fill, seat and shoot.

Then, at your leisure, take a micrometer and calipers to you 30-06 conversion brass, measure all the pertinent dimensions, and compare the two types of loaded cases side by side.

LD

PS Rub magic marker all over one of your present cases, attempt to chamber it (not too hard) and see where it rubs off.

excellent suggestion!!!!!

quote:

Originally posted by vapodog:

quote:

Originally posted by lawndart:
Give Grafs a call, and order 100 Argie cases.

Prime, fill, seat and shoot.

Then, at your leisure, take a micrometer and calipers to you 30-06 conversion brass, measure all the pertinent dimensions, and compare the two types of loaded cases side by side.

LD

PS Rub magic marker all over one of your present cases, attempt to chamber it (not too hard) and see where it rubs off.

excellent suggestion!!!!!

Might not be all that easy. murkan mike is in Germany.

Graf's in currently backordered on 7.65x53.

They used to carry it under their own name, now only the Privi.

flaco