7mm Rem Mag powder

[Lead hammer]

Hey guys, I have been working on a load with my friend for his A-bolt. We are having some trouble getting good accuracy from H1000 and 160 Nosler AB's. Factory 160 AB's shot MOA at 100.
I have RL 22 here for him to try. What powders are you having the best luck with in that bullet weight? I see IMR 7828, RL 26 maybe. Something that is not temp sensitive.
It reminds me of when my 270 just did not like H4831, but RL22 was and is great in it with 130gr bullets.

 

[rhkary]

I've used IMR 4831 in my 7 mag for years. It's my go to powder. Good accuracy and velocities.

 

[bbobie]

Reloader 25 first then Rel 22

 

[laker415]

I like RL22 and IMR7828 in the 7mm rifles I have loaded for

 

[Kelly Timoffee]

7828 has worked for myself in a couple rifles.

 

[350 Mag]

H1000 should work?

Did you try different seating depths?

Top choice for me in past for top velocity was Retumbo.

H1000 worked well for me with 160 AB and 168 VLD....usually just .005 off lands.

My choices would be.

H1000, Retumbo, H4831SC.

 

[john-brennan]

Retumbo has been great for me and R22 for 160gr accubonds

 

[Kelly Timoffee]

Just thinking out loud here, could you try a grain or two below minimum, just for poops and giggles, see if there are nodes lower down, also, if you have some 140's try em out just to see.

 

[todbartell]

I load 160AB in a friends 7mm Rem Mag, RL26 works fantastic. 3035 fps and last two groups I shot with it before handing it over to him, 0.4 & 0.6moa @ 398 yards

 

[Lead hammer]

Thanks so far guys. Yes the H1000 just is not happy, did a seating depth test just yesterday. We are going to go over his reloading procedures with the components he has one more time. Then it’s new powder time.
Todd, what was the powder charge you used? Must have been near the top.

 

[Hitzy]

Either of the 4831's work well for me in 7mm.

 

[mbogo3]

I use 61gr of IMR 4350/160gr Accu-Bond @ 2920fps groups .439" and does 40" of moose.

 

[Leatherstocking]

Another vote for IMR 4831. I shoot the 150 grn TTSX.

 

[dan belisle]

RL22 has worked very well for me in the Rem 7 Mag. - dan

 

[53moose320Elk]

Another vote for h3831 works in my a bolt 7mm , 150 Barnes ttsx

 

[freire]

160grs AB and IMR 7828 works like a charm.

 

[fellers88]

Another vote for 4831, but 7977 has worked really well for me recently and its supposedly insensitive to temps

 

[sigp226]

one more for IMR 4831 work good on 2 of my rifles.

 

[BigUglyMan]

I use 61gr of IMR 4350/160gr Accu-Bond @ 2920fps groups .439" and does 40" of moose.

I would have bet money that 4350 would be too fast for the 7 Mag but with accuracy like you're getting who cares if you're losing a few fps!

 

[mbogo3]

In my son's 70 classic 26" barrel neither 4831's were anything to write home about so I went with Ken Waters Pet loads manual's recommendation as second most accurate load tested.Over the years I saved a bunch of time and components following his lead.He knew his stuff.