Been curious about this cartridge but never built one. Cant wait to see your results!
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Rifle cartridge build ideas?
- Thread starter John Klingenberg
- Start date
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ntsqd
Well-Known Member
Somehow I ended up with some RCBS dies for this and didn't even know what it was until this thread. I had assumed it was something based on the .30-30 case given it's intended use and Contenders being the dominate (?) choice at those events.
Now I'm thinking that I've got this SA action that it could work in........
Now I'm thinking that I've got this SA action that it could work in........
Blancoalex
Well-Known Member
Pretty neat forming your own cases. Just had to learn myself for making 6mm Remington short aka 6mm HLS. Now need chamber barrel for it.
wildcat westerner
Well-Known Member
- Joined
- Nov 14, 2009
- Messages
- 735
Since you obviously like to tinker and consider the 7mm-08 too big, you really have a single choice to push 140's as fast as you like; the 7BR Improved!
WW
WW
Never mind. I was going to post something brilliant but realized it wouldn't be so.
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John Klingenberg
Well-Known Member
Well I'm on the road and the preliminaries are really promising. I've only tried one load of each bullet weight. The case is only filled to just below the shoulder with H322 powder so I believe theres a lot of room to grow.
33.5 gr of H322 10 shot average with Magnetospeed.
140gr Nosler BT. 2643fps
150 Sierra HPBT Match 2654fps
160 Sierra Gameking. 2606fps
36 gr of H322 10 shot average
110 gr Speer TNT. 3010fps
Sub half MOA with the 160 grain bullets and 3/4 MOA with 150s. The 140s and 110s and 120s (i didnt chrono the 120s) were terrible, as in 3 inch groups. I havent even tried new powders, seating depths, brass sorting etc yet. I'm trying to formulate the best process to save time and primers of course for round two of testing. I did acquire a box of 162gr Eld-X I'm dying to try out. If at all possible to reach 2700fps with them the paper ballistics are really really impressive with its .616 bc.
33.5 gr of H322 10 shot average with Magnetospeed.
140gr Nosler BT. 2643fps
150 Sierra HPBT Match 2654fps
160 Sierra Gameking. 2606fps
36 gr of H322 10 shot average
110 gr Speer TNT. 3010fps
Sub half MOA with the 160 grain bullets and 3/4 MOA with 150s. The 140s and 110s and 120s (i didnt chrono the 120s) were terrible, as in 3 inch groups. I havent even tried new powders, seating depths, brass sorting etc yet. I'm trying to formulate the best process to save time and primers of course for round two of testing. I did acquire a box of 162gr Eld-X I'm dying to try out. If at all possible to reach 2700fps with them the paper ballistics are really really impressive with its .616 bc.
John Klingenberg
Well-Known Member
John Klingenberg
Well-Known Member
I have a die set for 7mm Laser that's supposed to be an improved 7Br but I havent found a cartridge drawing or anyone with a reamer...yet
wildcat westerner
Well-Known Member
- Joined
- Nov 14, 2009
- Messages
- 735
Good Luck in your search.
WW
WW
Looking good you should put all them Bullets on gun broker and buy a new truck.just kidding I would rather shoot .
John Klingenberg
Well-Known Member
If anyone needs a bunch of Hornady 139gr flatnose 7mm bullets I have about 600. Those I'll part with. They'd make a good lever gun load.
John Klingenberg
Well-Known Member
I've used .257 Robert's and 7x57 to form 6mm Rem at times.
John Klingenberg
Well-Known Member
You run out of powder space too fast in the grendel. And to use bullets of any decent size you have to go to a PPC style magazine. I wanted a little better powder capacity than the Grendel had.
