best 7mag powder

firstcoueswas80 · #1 01-31-2006, 02:39 PM

i am pretty new to reloading and was wondering what everyone likes out of a 7mag. the powder needs to meet these requirements:
i am going to shoot 140 accubonds, or 139 interbonds, i would like the highest veloctiy possible with the most consistent and accurate powder. powder needs to be pretty temperature in sensitive. i sight in at over 7,000 ft and hunt around 3500-4500. i do not know anything about powder burning speed, or ball powder vs kernel. the only ball powder i have ever shot was ramshot out of my 270wsm to test the load. i have loaded some R22 and got decent results with the 140 accubond, at aroun .975 but looking for something to shoot tighter.
Casey

James H · #2 01-31-2006, 04:09 PM

I use H4350 with Barnes 140 gr TSX bullets in my 7mm Mag.

Here is a link to Hodgdon loading data (only maximum loads are shown).

http://www.hodgdon.com/data/rifle/7mmremma.php

and here is a link to the temperature variability of H4350 and other Hodgdon "Extreme" Powders. With a comparison to competitive powders.

http://www.hodgdon.com/smokeless/extreme/page2.php#top

sullijr · #3 01-31-2006, 04:34 PM

Work up to it but I have been shooting 71 gr IMR 7828ssc with very good results in a M700 and a Ruger#1.

Fiftydriver · #4 01-31-2006, 07:26 PM

Reloader 19 and 22 have both worked extremely well for me in my 7mm Rem Mag with 140 gr bullets. Obviously the two 4831s are also a good match to this bullet weight in this case as they are very similiar in burn rate with R-22.

Kirby Allen(50)

johnnyk · #5 01-31-2006, 07:37 PM

I have had the best results with Hodgdon and IMR 4831 and RL22. I shoot mostly 150gr pills with RL22 (67gr) and CCI BR2's. I load quiet a bit of the 4831's for friends, however. Johnny K.

Al Hansen · #6 02-22-2006, 07:37 PM

I shoot a Rem. 7mm. Not the lighter bullets , but the Hornady 162 Grn Soft Pt.B/T w/ 64grns. Accurate 3100 Magnum powder. I feel good about the results. Brass has held up well.

sewwhat89 · #7 02-22-2006, 08:27 PM

With 140 gr class bullets, I always had the best results with RL 19. My brother tried to top it trying some IMR 4064, but the loads were too hot for N TX heat. I would think H4350 would probably be the best powder of the Hodgdon line for the 140s. If you stepped up to the 160+, H1000 and Retumbo would take over. There is my 2c!

I just reread your post, H1000 would get my vote! The RL poweders drop some velocity pretty quick below about 45F and above 90-95F according to my chrono'd loads in a 300WM. H1000 did not change more than 20 fps from 35-105F.