I have used IMR4895 immediately followed with Varget (600 yards) and experienced problems with the first couple rounds being flyers out into the 8 ring. Recently I have wondered if H4895 followed by Varget would be more compatibly because of a more similiar makeup or chemistry (barrel residue)?

Anymore I use just one powder because it's not worth the hassle, but I am curious.

Thanks

I don't think varget likes to follow anything.

Why are you changing powders?

I use H4895 in my 6mm woa for 200 and 300 followed by Varget for 600.  Worst I've done so far is a 197.  Almost always my first sighter is an x or 10.  I even use Hornady V-max bullets on the short lines followed by a Sierra 107SMK for 600.

YMMV.

I have no idea why this happens, but I accept that is does.

I have been developing loads for my daughter's WOA and have seen the same phenomenon. As a result, I find a light cleaning to be less frustration between changes.
This also implies one would have to pre-determine how many rnds to fire after a change to get back to performance. Cleaning between changes is okay at the short lines, but you will need to know exactly before the 600.

There is a list out there in internetland of which powders you can ( and shouldn't ....) use after another.... I'll have to see if I can find it.... I think it is from the "Hi-Power" website...

http://www.usrifleteams.com/forums/index.php?...maybe..

I found the thread I was thinking of...http://www.usrifleteams.com/forums/index.php?showtopic=14581&hl=compatibilities&st=15... you'll have to join to view..


THE FOLLOWING IS QUOTED FROM THE ABOVE LINKED THREAD !!



Posted 20 October 2009 - 07:09 AM

One thing to keep in mind is that cleaning between powder changes can mitigate compatibility problems. Maybe the AMU shooters run a patch through their bore when they change loads.

Anyway, here is the compatibility list I compiled a few years ago. It is in no way scientific and compiled nearly 100% by hearsay.


Quote

Powder Compatibilities

Short Range Long Range OK?
2015 H4350 No
4895 N540 Yes
AA2520 N540 No
AA2520 N135 No
IMR4895 Re15 Yes
IMR4895 Varget No
IMR4895 IMR4064 Yes
IMR4895 H4350 Yes
IMR4895 N540 Yes
H4895 Re15 Yes
N135 N540 OK, No
N135 N140 Yes
N135 N150 Yes
N140 N540 No
N140 H4350 No
N140 Varget No
N540 N550 Yes
N540 IMR4895 No
Re15 N540 Yes, No
Re15 N550 Yes
Re15 N140 No
Re15 Varget No
TAC N135 Yes
TAC N140 Yes
TAC Re15 Yes
TAC IMR4064 Yes
TAC Varget No
Varget N540 No, Sighters low, rest OK.
Varget H4350 Yes
Varget N140 Yes
Varget IMR4064 Yes
WC844 Varget No
WC844 Re15 No
WW748 Re15 No
IMR4064 N150 Yes


I also copied the main info.