243 Winchester with 105 AMAX

[laker415]

So I am looking for some advice on this combination. I am working with a remington 700 varmint with the 26" 1:9 1/8 twist barrel. I have a load with H1000 giving me about 2745 FPS and it was the most promising out of my test charges. I am wondering if there are better powder options for this bullet in this gun. I am not blown away with the groups I am getting and I am also not too excited on the price and availability of H1000 on this side of the country. Does anyone have recommendations from personal experience before I burn up a bunch of different powder? I have quite a variety on hand and a decent selection locally. H1000 just seems to be a tough one to come by. Any advice is appreciated. Thanks.

 

[Eagleye]

IMR 7828, Reloder 19, 22 and 23, Norma MRP, H4831sc, Vihtavuori N560 and N165.
One of these should fill the bill. Dave.

 

[prairie lover]

I use h 4350 for 105s in mine, and 100s and 90s in 2 others. great powder, excellent accuracy. goes 2800 fps with the 105s with middle of the road pressures id say. I have 13 firings on rem brass, full length size and trim is needed about every 4 firings. tried other powders back when the gun was new, hybrid 100v and supreme 780 I do believe, both were faster but not as accurate. supreme 780 went to over 3050 fps with the 105s!

 

[b72471]

Appears you have a factory rifle and barrel 1:9.125 twist. Hornady may say their bullet stabilizes in that twist and it may? If you were to try the berger 90VLD with H4350 I belive you will have tighter groups.
Enjoy

 

[laker415]

I use h 4350 for 105s in mine, and 100s and 90s in 2 others. great powder, excellent accuracy. goes 2800 fps with the 105s with middle of the road pressures id say. I have 13 firings on rem brass, full length size and trim is needed about every 4 firings. tried other powders back when the gun was new, hybrid 100v and supreme 780 I do believe, both were faster but not as accurate. supreme 780 went to over 3050 fps with the 105s!

Thanks for the input. I have imr4350 on hand but I will try h4350 as well. I have Winchester brass and some brand new lapua for when I find my desired load. I did notice the velocity for supreme 780 was high in the book.

 

[laker415]

IMR 7828, Reloder 19, 22 and 23, Norma MRP, H4831sc, Vihtavuori N560 and N165.
One of these should fill the bill. Dave.

Thanks for the list. I have plenty of books and online resources at hand but was looking for personal experience. Trying to avoid sampling a lot of different stuff

 

[heyrosco]

I got some amazing groups with Hybrid 100V. 40 grains gave me around 2950 fps and fantastic accuracy.

 

[hammerz75]

+1 for H100V, 41gn getting me around 2930 with 107SMKs, this is under book max.

 

[notsorichguy]

My old "go-to" 243 powder was 7828. I recently switched to H-4831.

I didn't have very much luck with H-1000.

 

[prairie lover]

I shoot a savage with a factory 1-9.25 twist. both the hornady 105 a-max and hpbt shoot well. I never could get the 95 gr berger vld to shoot well.

 

[Shooter ----/]

I'm running a 6SLR and found that H1000 needs to have a compressed load to work well.