243 with H4350…?

[Sergeant Stadanko]

Superformance powder works great in my Remington Model 700 with bullets from 80-108grain!
Very flat shooting, top end of the velocity scale, and extremely accurate.

 

[Rflshootr]

I've had excellent results with IMR 3031 with the Sierra 85 HPBT in the 243 Win. You'd probably be able to find it locally if you don't already have some. Many years ago, I killed my 1st whitetail at 350 yards with that combo.
As far as the 4350, I'd start with 38.5 grs. and work up from there.

 

[243winxb]

243 Winchester cartridge-

Sierra 85 gr hpbt #1530 44grs H4350.

IMR 4350 will use less powder @ 42grs. to 43.0 grs.

Win Brass, BR 2 primers. Work up as always.

 

[Bob Wright]

When it cools off around here I plan on trying 100V, H4350 and Varget with the 85 gr Sierra. I'm curious mostly on 100V. It doesn't get much mention here.

 

[Rflshootr]

When it cools off around here I plan on trying 100V, H4350 and Varget with the 85 gr Sierra. I'm curious mostly on 100V. It doesn't get much mention here.

I'd like to know what you find out about 100V. My 1st instinct is that velocities will be low unless you have a long barrel. But, I've never tried it so it's just a guess.

 

[Bob Wright]

I'd like to know what you find out about 100V. My 1st instinct is that velocities will be low unless you have a long barrel. But, I've never tried it so it's just a guess.

It has spherical power chemistry but in a short extruded form. Burn rate is slower than H4350 and is between H4350 and H4831. Interesting stuff. I got 8 pounds of it. Better work!

 

[Rflshootr]

It has spherical power chemistry but in a short extruded form. Burn rate is slower than H4350 and is between H4350 and H4831. Interesting stuff. I got 8 pounds of it. Better work!

For some reason I had H1000 stuck in my head which would probably be too slow. On 2nd thought, it will probably be just fine. Good luck with it and let me know how it works out.

 

[AkleyFan]

I was at the range yesterday testing some hot loads of H4350 in my friend's 243Win M77 MKII:

45.5gr H4350 / 80gr TTSX / New Starline brass (good quality btw) / CCI 200 / 2.610" COAL runs 3285fps.

The 46gr load runs 3320fps. Both loads were flattening primers, but no other pressure signs - start well below this and work up.

He wants to run the 45.5gr load, it shot a .6" 3 shot group. His barrel shifts latterally up and right as it gets hot so its a 4 shot and let it cool a bit kind of rifle. Perfect for his hunting style - pigs and blacktail under 300 yards.