I have a new 7mm mag in sendero with a 26''barrel.I would like to know what the best powder would be for the 150gr b.t. by nosler.thanks for any help.

I like Reloader-22 and IMR 4831 for the light ones(145-154).
H870 or H570 for the 175 grainers.

I have my best luck with H4831 and 4831sc with the 140's. My 7 mag won't shoot any bullets heavier than that worth a darn.

IMR 7820 and H4831 best luck I have had with my Sako 7mm

IMR 7828 and RL22.

imr4831 & rl22 with 160 gr, h4350 with 139 interbonds...

IMR 7828 and V-V N160. Both powders put my 7m/m mag (26"bbl) over 3050FPS with 160 grain bullets.
I also load Sierra's 160 grain HPBT interchangeably with the partition, and both shoot to the same point of impact with N-160. I really like that powder.

AAdams,

The best luck I've had is w/ R22.

In a Factory 700 ADL w/ a 24" tube sitting in a glass bedded HS Precision stock it will shoot 1/2" consistently w/ the 150 NBTs. I'm loading 66.5 grains right now but, I've had great luck from 65-67 grains. 67 is Hot so be careful and work up to it. W/ 66 grains she chronos 3100 fps w/ the 150 NBTs, w/ that Sendero, you'll probably get closer to 3150.

Good Luck!

Reloader

I am using Ramshot Magnum with good results. It is both easy metering and temp insensitive.

I have been using IMR4831 with Nosler 150 gr bullets, the NBT will group 1/2" @100 and Partition 3/4-1" at 100. In this particular rifle I have found closer to max seems to provide the most consistant accuracy for a 3 - 5 shot grouping (1 - 2 gr below posted max in Nosler 4th).

I just got some RL22 and loaded it behind 140gr Barnes TSX, it averaged under 1" with 1 grain off published max (69gr). However I experienced a sticky bolt, yet no signs of excessive pressure shown. Does anybody find RL22 fincky in high heat (it was over 80 the entire time I was shooting last evening)? I also found stick with my 67 gr tsx load and even a few factory loaded NBT's, so not sure if my throat is just tight or what. Never had this type of trouble in the past then again I also never have shot when so warm....ah isn't it fun!

Best of luck

RL25 and Retumbo for 160 and above. RL22 and IMR7828 below 160.

I tried RL22 and IMR4831 in mine and am using H4831 and H1000 for the 160gr bullet

My best luck for 140 - 160g bullets has been with RL 22.

My best 140-grain load uses H4831, and for 175-grainers I prefer IMR 7828...

RL 22 has been my favorite.

quote:

Originally posted by AAdams:
I have a new 7mm mag in sendero with a 26''barrel.I would like to know what the best powder would be for the 150gr b.t. by nosler.thanks for any help.

Take Rottweil 905 or Reloader 22!

H1000

I've had excellent results with H1000, and like the fact that it's a Hodgdon Extreme powder and can be relied to be temperature insensitive. Very consistent behind Hornady 162 A-maxs and 154 SSTs.

I like, and my 7mm Rem Mag likes Accurate Arms "Magnum Rifle Powder"! This powder is also known as AA-3100!

Very clean and accurate!

I've had good luck with RL19 - 63.5g under the Accubond 160g.