7mmRemMag

wisconsinteacher · Jul 11, 2014

I have some 150 B-tips to load up for a 7mm RemMag. I have IMR4350, H4381sc, H4350, RL19 and RL25 on the bench. Which one would you start with and at what charge?

SJB358 · Jul 11, 2014

I'm running 68.5 grains of MRP with the 150 Swift. I'm thinking I was up around 68-70 grains with the same bullet. I'll take a look at QL tomorrow morning for you to give you a starting point.

Oldtrader3 · Jul 11, 2014

My 7mm rem mag is at max with 63.0 grains of IMR 4350 at about 3050 fps with 150 Partitions.

Elkman · Jul 11, 2014

WT, as Charlie suggested, I would start with 60/61 gr. of H -4350. Works well in mine with 160 gr bullet.

ksubuck · Jul 11, 2014

My best load for 150 grain BTips with IMR4350 is 62.5 grains running 3035fps in a 24 inch barrel.

Bruce Mc · Jul 12, 2014

Nosler shows 63 gr max for IMR 4350 at 3248 fps. I'd start somewhere around there if I were starting a new load work up on a 150 gr.

baltz526 · Jul 13, 2014

I would start with H4831. Expect to hit max pressure at about 3100fps

lhsako · Jul 19, 2014

I'd start w/ RL22 and work up from the nosler manual.

Darkhorse · Jul 19, 2014

My go to powder for the 7mag has been IMR 4350 ever since I bought the rifle in 1982. But if I had some of the powders on my shelf that you do I might be tempted to try some of those. After I had exhausted the possibilities of IMR 4350 of course.