Has anyone worked with 4100 in the shorter cases like the Miller or Miller Short?
Thinking about trying some my AA9 stach is about all gone.
Oh, while I've got you have you seen much difference in primers in the shorter cases?

Thanks, four finger Van

@JackHughs - 
What are you using for bullet weight and seating depth?  I assume breech seat, but the weight is unknown.  I ask, because I ran some assumptions in Quickload, and didn't get pressures that would be splitting cases.....

Interesting discussion.  I'm using about 13.0 gr. 4227 in a .308" 32-20, breech seated in a Ruger No. 3.  Using Starline brass I've got about 35-40 firings per case and (knock wood) never had a brass problem.  Bullets up to 220 gr., cast about 30-1, and have used Emmert and Gapko lubes.  Have not had the consistent vertical dispersion you're reporting, though.  Will have to give 4100 a try if I can find it at the next gun show.

David

tenx wrote on Jan 11^th, 2012 at 9:30am:

Thanks, Pete.  Probably Bob's Shooting Supplies from Monroe?

David

Jack,
Have any primers been better than others regarding your vertical and was 296 and 4227 better for case life?

I've used 296 in the 32/40 and it gives about (at least when I've chronoed it) 5-6 fps ES and 2.6 or less SD.

Frank

Gentleman Jack is a close friend and a fellow competitor and to date you would be hard pressed to find some who could honestly steer you in the right direction in regards to the successful use of AA-4100 for our sport. It is not unusual for him to shoot a 250 in his weekly practice sessions and he has also accomplished shooting back to back 250's so please do not take what he has to share lightly. His dedication to load development is second to none and thus his continued success. This success comes from a tremendous amount of hard work and dedication and it is not unusual for him to be at the range on multiple occasions on a weekly basis. He is continually fine tuning his load for the ever changing conditions we face and to get yet more out of what his CPA Rifle has to offer. His willingness to share his priceless information is a true indication of what we who shoot this sport are truly about. 

J.Louis

I shoot 4100 in my wife's MIller Short with a 206 grain bullet and in my .33 caliber, 239 grain bullet on a .357 Max case.  In both cases I get better 200 yard accuracy than with H108.  Never did have much luck with #9.  It is not consistant from lot to lot in my experience.

Good luck,

Bruce

Van,

  I using 12.2 grs. of AA#9 behind a 205 gr. bullet. It's very accurate. Haven't got a 250 yet but have gotten a coupla 249's.

The big problem for me is after firing two or three rds. with one case you have to beat on the lever to get the case out. So have been taking along 100 primed cases and only firing one shot with each. Would like to just use one case like I do for every other gun. I can't complain about the accuracy because shooting in the high 240's all the time is nothing to gripe about but think possibly being able to use just one case might up the scores some.

The 4100 was recommended to me by J. Louis who says a few of the shooters out his way are using it and note longer pressure curves. So with a little luck maybe this powder will cure the problem or at least reduce it to a manageable level.

Pete