Hot 7mm Rem. Mag. load question

[cottonmouth]

I have an 1885 Browning in 7 mag. And have been trying several loads, went by a buddy’s place today and tried three loads and then he offered a fourth one to try. 145 grain Speer Grand Slam loaded with 65 grains of IMR 4350. Don’t look for it in the book, they don’t go this high! LOL Just wondering if anyone else has had any experience with a similar load. I didn’t see any pressure signs and got a three shot 100 yard group that was just over ½ an inch.

J.B.

 

[Ridgerunner665]

Hodgden ( http://data.hodgdon.com/cartridge_load.asp ) lists loads hotter than any load manual...and even they don't go that high.

I'd back it down to at least 61 grains...

 

[cottonmouth]

I think I will back 'em down some. I pulled one of these bullets down today and found they were loaded with 66.8 grains! The 1885, B-78’s and No.1’s are stout guns, this load in something else might cause problems but I did find a load in my Lyman book that is very close to the 65 grains of IMR 4350. I’ve got some 120 HP’s to try that I loaded, hope they do good.

J.B.

 

[243winxb]

Not all 7mm rem mags are the same. I know of one that would digest loads way over published data. Start low on the powder charge and work up as always.