If you didn't have either powrer and were going to develope a 270 Winchester load, which would you buy first? Thanks.

actually I'd go for H4350
IMR 4831 is about 10% faster than H4831 according to people more knowlegable than me hope this helps

I always used 55 grs IMR4350 in my 270 and 130grs. Four different rifles all shot submoa. Loadtech shows a higher velocity with IMR 4831 vs H4831

FWIW, it seems I always have gotten slightly better accuracy from the IMR versions, and therefore always used them as my first choice. But now that Hodgdon owns IMR, they might just be the same powder. Hodgdon doesn't make, and has never made their own powder. Maybe we've been buying IMR in Hodgdon packaging all along and just didn't know it.

A little tid bit of info that may help, my savage 270 loved H1000 with 130 gr Nosler B-tips. For a sporter rifle it shot .6 inch 5 shot groups. Fluke?? not real sure but it liked it.


A man should never stop learning, so a man should never stop asking questions.

What load of 1000?

H4350 H4831SC H4895 and varget to name a few are made in Australia by ADI these are great powders

quote:

Originally posted by craigster:
FWIW, it seems I always have gotten slightly better accuracy from the IMR versions, and therefore always used them as my first choice. But now that Hodgdon owns IMR, they might just be the same powder. Hodgdon doesn't make, and has never made their own powder. Maybe we've been buying IMR in Hodgdon packaging all along and just didn't know it.

I have used them both and the H 4831 SC meters a bit better. Not a great deciding factor but if all else is equal..... Just an observation, Worth what you paid for it.

ramrod340,
It has been a while since I loaded any for it, I think it was 63, it was compressed, so work it up.

I started out loading the .270 Win. with H4831. Later, I went to IMR 4831 because I could acheive the same or better velocity and equal accuracy with less powder, so my loads weren't as compressed.

Today, I don't load the .270 Win. all that much, but I would seriously experiement with H4831SC, H4350SC, Reloader 22, plus IMR 4831.

One of my friends is a fine custom riflebuilder, and he recently had trouble getting a .270 he built for a client to shoot the way he wanted it to. He told me that finally he tried H4350SC, and with that powder accuracy became stellar.

It pays to experiment.........

AD

I've used H4350 and H4831SC---both work well but now I only use H-4831sc in my 25-06.

IMPORTANT--IMR-4831 and H-4831 ARE NOT THE SAME.
IMR is hotter and will cause the primer to back right out of the case and jam the action.

RL19 & then for a bit slower, IMR7828. 7828 is just perfect in my .280 especially w/ 160-175gr bullets.

Either 4831 is excellent, I would worry over the two...

I use some old 4831 surplus powder and it will better any of todays powder by a 100 FPS in a .270 and at less pressure, its the same stuff that Jack O'Connor used...

I saw some of this for sale in the Classifeid section here on AR...Its worth the money.

I, too, use some hoarded surplus WW II era 4831, but that's not an option for Leo and not what he asked.

There have been at least five versions of 4831: Original surplus; "newly manufactured" IMR from DuPont (later IMR, now Hodgdon); Hodgdon 4831 "newly manufactured" from Scotland; Hodgdon 4831 made by ADI, and Hodgdon 4831 Short Cut also by ADI.

The IMR version is very little different in speed than 4350. I find no advantages to it. The H-versions are somewhat slower and better adapted in speed to the .270, in my opinion. Anecdotal evidence indicates that the SC version is slightly slower than the regular version despite Hodgdon's claims that they are identical.

My recommendation: First choice should be H-4831 (in whichever version you prefer). Second choice would be IMR 7828, which is only a tad slower than the original surplus 4831. Powders like RL-22 (Norma MRP) are in the right burning range, but are infamous for lot-to-lot variation. If your chamber/barrel is a bit "loose", meaning that it digests more powder than typical, then the faster 4350 might do okay, but in most .270s 4831 will do better.