Gunsmithing Reloading question
- Thread starter Hollister
- Start date
Going to fill in a few blanks
375 R
250 Gr GMX Hdy
These powders are listed by Hornady
8028 XBR
Varget
IMR 4007 SSC
Aliant R 17
H414
Big game
All of these get to 2500FPS
375 R
250 Gr GMX Hdy
These powders are listed by Hornady
8028 XBR
Varget
IMR 4007 SSC
Aliant R 17
H414
Big game
All of these get to 2500FPS
I have had great luck with Varget and RL-15 with my 375 Ruger a pretty nice shooting gun, especially when you figure how much energy it delivers and the ability to put two holes in every land mammal in North America from almost all angles with the right bullet. I shoot Hammer bullets a solid copper bullet designed for hunting.
140 gr 270 on a 375 Ruger case 38° shoulder 24" barrel 1/10 twist
That's all I have
No listing in QL for Either 270/375 or 375/270 ?
Unless I'm just not understanding ??
Can you load some Pics Hollister? I'm kinda curious now....
Unless I'm just not understanding ??
Can you load some Pics Hollister? I'm kinda curious now....
You can enter custom cartridge data into QL though, thats how we worked up loads for the .458 socom when it was new. i.e. get the saami specs for the .375R, then change the shoulder and neck dimensions for his .277 bore diameter. It will spit out some load numbers that way.
It basically 270 PRS/ruger.
All the standard magnum powders will work.
7828 is one of them.
H1000,7977 and R26 are where I’d be looking possibly even slower like retumbo.
something Like this with the 170EOL certainly would be interesting while it lasted.
All the standard magnum powders will work.
7828 is one of them.
H1000,7977 and R26 are where I’d be looking possibly even slower like retumbo.
something Like this with the 170EOL certainly would be interesting while it lasted.
Don't know the difference between custom and wildcat. But after I thought this up I discovered Gunwerks 7LRM was a 375 Ruger necked down to 7MM. I said GREAT! Only needed to neck it down one more size. Hornady made the dies and Pacific Tool made the reamer. Now I want to finalize building the load.
How do I determine grain weight on any of those powders? There is no info on my caliber yet. I named it 277 Wysong Rogue
As in charge he weights?
Well you have a few things going for you.
1-You can get a rough capacity from 300 prc
2-7/300PRC is a thing and it’s a very in close bore and capacity, some quick searching and you can get some load info from that and devise a safe starting charge.
I have done this a few times.
Recommend you find capacity of case. Then start comparing with similar case capacity and same bore. ie, 270 Weatherby, 7/300 Win etc.
If you end up over 75 grains 7828 suggest trying H 1000 and 150/160 grain bullet.
I think you will get 73-75 grains 7828 in that case filled to base of neck.
Recommend you find capacity of case. Then start comparing with similar case capacity and same bore. ie, 270 Weatherby, 7/300 Win etc.
If you end up over 75 grains 7828 suggest trying H 1000 and 150/160 grain bullet.
I think you will get 73-75 grains 7828 in that case filled to base of neck.
