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25 caliber 143 ELD-M today......

Preacher said:
Dug my 7 1/2 twist 257 SAUM 35 IMP out to check out the new 25 caliber 134 LD-M bullets from Hornady....
Got close yesterday, and ran a few them today..
Pretty impressed so far...

View attachment 1466496==
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I just picked up a new BAT Igniter action Saturday and I'm waiting for my Bartlein 8tw to arrive any day to build a straight 25 SAUM to shoot the new 134 ELD M. I'm not sure which powder will be best but if I can get enough of it in the case I was thinking N570 would be a top velocity performer but it has some of the biggest chunkiest kernels of about any powder I've ever used so I may run out of case volume before it pressures out.

I'll be using necked down ADG 6.5 SAUM brass for my 25 SAUM, whose brass are you using for your 257 SAUM Imp. and do you by chance know what the case capacity is, in water, of one of your fireformed cases?
 
B23 said:
I just picked up a new BAT Igniter action Saturday and I'm waiting for my Bartlein 8tw to arrive any day to build a straight 25 SAUM to shoot the new 134 ELD M. I'm not sure which powder will be best but if I can get enough of it in the case I was thinking N570 would be a top velocity performer but it has some of the biggest chunkiest kernels of about any powder I've ever used so I may run out of case volume before it pressures out.

I'll be using necked down ADG 6.5 SAUM brass for my 25 SAUM, whose brass are you using for your 257 SAUM Imp. and do you by chance know what the case capacity is, in water, of one of your fireformed cases?
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Using Remington at the moment, but probably will use some of my ADG stash. The Remington is on 7 loads now and still tight at 3100 FPS......Never weighed one, but can if you want..
 
Preacher said:
Using Remington at the moment, but probably will use some of my ADG stash. The Remington is on 7 loads now and still tight at 3100 FPS......Never weighed one, but can if you want..
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If you could measure one that would be great. The SAUM case is already pretty straight with not much taper but squaring the shoulder off a bit more would increase case capacity a little. I'm just curious how much. The guys at UM have a "improved" SAUM they're doing in 6mm and I think they're getting something around 74gr H20 case capacity with their improved version.

I briefly considered doing a improved 25 SAUM but I just didn't want yet another I have to fireform brass for so I'm taking the easy road and doing a straight 25 SAUM. I, also, considered necking down ADG 7PRC brass for even more performance, instead of doing an improved SAUM, but I wanted a short action build so that wouldn't have worked and barrel life is already going to be short with just a straight 25 SAUM.
 
B23 said:
Do you plan to shoot either the 133/135 Berger, Hornady 134 ELD-M, or something else?
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I’ll probably be using this as a light carry rifle for hunting. I have the long range stuff covered. I bought a Kimber 270 WSM, beautiful wood and good platform to build on fir what I want. Zack has been having fun with his, I believe he’s shooting 110 accubonds through it. I’ll be using lighter bullets too, 110-120.
 
B23 said:
Do you plan to shoot either the 133/135 Berger, Hornady 134 ELD-M, or something else?
Click to expand...
I have also in my stash of 25 caliber stuff, some 131 Black Jack's from Sierra, and 133s from Berger up nest..
I'm betting a head a little, but wouldn't surprise me any if the 131's are the winner according to either of my hunting rifles that use them. A 7 1/4 twist 25/284, and another 257 SAUM Imp 7 3/4 twist.. Both Brux heavy #5's @ 28"........
Only reason the 6.5 and the 257 are improved is because of my 7mm SAUM Imp reamer that I bought off this site years ago.. I use Warner Tool dies and wanted to use just the one body, and use the outstanding neck shoulder bushing they make... I'll do some measurements tomorrow....
 
Remington case weighed 222.840 empty and 296.570 with distilled water.
737.835 is the difference...
Going to prep some ADG 7mm SAUM brass today and see if it improves the groups..
The Remington brass acts weird sometimes...
 
Preacher said:
Remington case weighed 222.840 empty and 296.570 with distilled water.
737.835 is the difference...
Going to prep some ADG 7mm SAUM brass today and see if it improves the groups..
The Remington brass acts weird sometimes...
Click to expand...
So you.re right around 74gr +/- H20 case capacity with Rem brass. Much appreciated, thank you for taking the time to do that.

When you get the ADG brass formed is there any chance you could measure that stuff too? :)
 
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