243 win. powder choices

[Rem6br]

H414 & H380 are really good powders but bear in mind that they need magnum primers to ignite properly.

I sure didn't know that I guess I need some magnum primers now :-\

 

[Gman]

H414 & H380 are really good powders but bear in mind that they need magnum primers to ignite properly.

I sure didn't know that I guess I need some magnum primers now :-\

I used Fed GMM 210 primers with H414, and had no ignition problems whatsoever. I will say this, the H414 with Sierra 80 gr Blitz, in a Lapua case had too much extreme spread in fps with the same powder charges. Each charge was weighed individually (not dropped).

 

[JohnnyJohnson]

You should try IMR 7828 and its available at Powder Valley.

 

[flyinbrian]

My go to load for 105 Amax and 107 SMK is 48.4 gr Retumbo, with 46 gr. H1000 a close second.

For Berger 88 FB and 95 VLDs IMR 7828 is the most accurate.

 

[joecob]

Just ordered IMR4350 from Powder Valley. In Stock.

 

[xpilot]

4350.

I used to shoot 44.5 grains of 4350 behind the Sierra 85 grain HPBT. It was the world's most versatile load.

It would turn varmints inside out and kill deer like nobody's business. On deer, you *had* to stay out of the shoulder...it would tear up a fearsome amount of meat. As long as you did a neck or double lung, there was nothing better. Nothing.

+1 for sure. If your 243 won't shoot this load, it won't shoot

 

[sbranden]

GSPV or xpilot - what speed were you getting with the 85HPBT's under 44.5 of IMR-4350 ?

I really like 4350. It has probably given me by best groups to-date at 43.0 grains with the Sierra 80 SBT (Blitz) bullets at a comparator measurement of 2.305" which in my gun is about .027 off. But it seems slow. I'm currently playing with Reloder 17 as a result, but let me know what velocity you were getting with 44.5 of 4350 & the 85's.