Has anyone tried the new IMR 7828 SC in loads for the .270 Winchester? It should be possible to get the highest velocities with this powder. The old IMR7828 was a bit too large-grained to be able to get enough into a .270 case to get the best results. But the new SC version of this powder, having smaller grains, should allow one to get at least 62 grains of the stuff in a .270 case.

The old data for the .270 used the older surplus H4831 powder. Regardless of what Hodgdon may say, the new H4831 available today is faster-burning than that old stuff, so it is generally not possible to get the velocities that O'Connor and others used to get from their .270 rifles in the 1950s and 1960s from the surplus H4831 they used, when using the new version of H4831 available to us today. But this new IMR 7828SC just might have a similar or even slower burning rate than the old surplus H4831, and yet allow getting enough powder into the case to duplicate or even better the velocity results those old boys got.

Anyone used it?

IMR-7828 didn't give me the best results in any bullet weight from 90 grains to 180.

I'm not a .270 guy but my .280 loves 7828 * 7828ssc w/ 145-160gr bullets. I would think it would work well w/ 140-150gr in your .270. Might be a bit slow for 130gr though.

RL 22 is the speed demon in the 270

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Originally posted by ricciardelli:

IMR-7828 didn't give me the best results in any bullet weight from 90 grains to 180.

I understand that, but what about the new SC version of that powder?

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Originally posted by cummins cowboy:
RL 22 is the speed demon in the 270

Tha has been my experience too, but what about the new SC version of IMR 7828?

I was wondering about Accurate's Magpro powder in the .270 Win. A lot of people claim it gives the highest velocity in the .270 Winchester Short Magnum and Accurate's data claims over 3200 fps with the 130 gr and over 3000 fps with the 150 gr bullet in the .270 Win. That puts it within 100 fps of the WSM, if their data is reliable. Being a ball powder, it should allow for maximum charge weight in a given case.

Lloyd:

I haven't tried 7828 SC, but I suspect it would be excellent in the .270. If I didn't already have a healthy supply of powder in that burning range, I'd buy a keg of it myself.

While RL-22 typically does well, you never know what you're getting in the next cannister of RL-22 as it (and the corresponding Norma powders) are among the most variable in cannister-sold powders from lot to lot.

FWIW, 60 grains of AA3100 behind a 130-grain Speer GS and a CCI-200 gets a chrono'ed 3150 fps @ less than moa out of my 22" .270 BDL. That is plenty good as far as I am concerned...

I use 7828 in my .280 & .260ai. I haven't seen any diff. in accuracy or pressure when switching to ssc. So if your rifle doesn't like 7828, I'll bet it won;t like ssc either.

My 270 WSM doesn't like the IMR-7828 SSC as well as RL-22 but my .243 WSSM absolutely loves it. If you ever shot 7828 the new SSC is fantastic, try it and you will see. Good shooting.

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But the new SC version of this powder, having smaller grains, should allow one to get at least 62 grains of the stuff in a .270 case.

What bullet are you planning to use with 7828 and 62 Grains?

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Originally posted by Jay Johnson:

quote:

But the new SC version of this powder, having smaller grains, should allow one to get at least 62 grains of the stuff in a .270 case.

What bullet are you planning to use with 7828 and 62 Grains?

A 130 grain one.

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Originally posted by LE270:

quote:

Originally posted by Jay Johnson:

quote:

But the new SC version of this powder, having smaller grains, should allow one to get at least 62 grains of the stuff in a .270 case.

What bullet are you planning to use with 7828 and 62 Grains?

A 130 grain one.

The hottest documented load I'm aware of for IMR7828 is 59.0 Gr.(MAX) in Hodgdon edition 26. There may be some a little hotter. But no were near 62? If your gun likes it the 59.0 Gr. load should work very well for you it's over 3100 fps from a 26" barrel.

From the IMR site:
http://www.imrpowder.com/data/rifle/270win-2005apr03.php

Fred

Looks like IMR is saying 60.2. That's the best load I've seen so far. Their MV is a little lower but is from a 24" vs 26" barrel. Thanks for the heads up on that documented load.

This powder wors well in my 7WSM with 140 grain TSX slugs. According to IMR it MAY be possible to boost SOME cartridges by as much as 4% over the regular 7828, but not all. It's been a good performer for me in .270 win. with 150 grain Grand Slams, but have not tried the ssc version yet.

Where I find the ssc version helpfull is in smaller cap. cases like my .260ai. I can get the charge into the case I want w/o overcompression. For other rounds I use 7828 in, the std. version works a bit better by giving near 100% load density.

My .270 handles 62.5g 7828sc behind the 130g Hornady with no pressure problems whatsoever.