RL19 Powder consistency

7mmSendaro · #1 03-19-2007, 07:30 PM

I have finally found a combination that works great in my 7mm Rem Mag Sendaro using RL19 Powder and 168 Bergers. In some other threads I have seen reference to inconsistency with Reloader powders. Can anyone give me details,if any, on problems encountered with Alliant Powder? I just want to know what to look out for. This load shot a 5 shot group at 100 yards of .390!

kraky · #2 03-19-2007, 09:34 PM

Basically they seem to have a rep lately for being hotter or colder than the last lot that people buy. If I was you and had a magic load I'd take that lot number back to where you got the powder and pick up another 2#'s. If not you'll have to adjust your load via chrono and hope the same speed gives the same accuracy when you get a different lot number.

7mmSendaro · #3 03-20-2007, 06:48 AM

Unfortunately, the Gander Mountain whewre I bought the powder now has a new lot number. I am going to call around to some other local gun shops and hope someone else has the same lot. It was an 2005 lot, so I'm not very optimistic. Thanks,

jeffbird · #4 03-20-2007, 07:14 AM

Buy 10# from the same lot number and adjust the load to reach same speed with a chronograph. Take a few loaded with your current load to run as a control group on the same day you test. Don't worry, it will work quite nicely. I did the exact same thing with RL22 and there actually was not much, if any, difference in lot numbers run almost a year apart.

7mmSendaro · #5 03-20-2007, 07:29 AM

Thanks, that makes me feel better. It has been kind of a long road to find this load. RL19 certainly didn't seem like the most likely powder, but it works great in my rifle.

41mag · #6 03-20-2007, 04:47 PM

I hit upon a load with RL-19 in our 7 mag Sendero and the 162gr Hornady BTSP's. They initially shot into 1" groups at 300yds. I am pretty sure they still would if I had the time to get out and shoot as much now as I had time for then.

I need to get the thing back together and work up a slightly milder load for it. THe one I had was great as long as temps were mid 70's and down. Over that they got a little wiggy from time to time.

Boman · #7 03-20-2007, 08:26 PM

7mmSendaro,
Do you mind sharing your load recipe with the 168gr Bergers.