Good morning. I have a 300 Win Mag, 26 in , 1-10twist bbl. I recently came into some 200 grain ELDX bullets and got some test loads to shoot with 4831sc, then realized that I was out of that powder.
I was able to find two pounds(same lot#) of IMR 7828 ssc. I'm not finding alot of load data for this powder. Any of you use this with 200 grain bullets?
Nosler book lists 64.5gr to start and 68.5 max
Hodgden site lists 70gr to start and 74 max!
That's quite a difference. Any help with this would be much appreciated! Thanks!
I have been using 7828 in my 7x300 Wetherbys for a long time, and it has proven to be a very good powder for me especially from the velocity stand point.
One word of caution however is to approach max loads very cautiously.
When the door slams with that powder it slams very hard.
I would strongly suggest you start at a known safe load point, then increase the charge weight in half grain increments
for just one round, and increase a half grain for one more and so on till you detect the slightest bolt sticky.
When you reach that point STOP, dont even try another half grain, because it could well lock up your gun.
Also best to do your testing on days with moderate temps, not cold days where you might be able to use a slightly heavier charge.
