S&W mp15  16" 1in 9 twist barrel

The 60 gr v max showed a liking for 8208 instantly. This rifle is fairly new to me with about 500 rounds through it. The 60 gr v max with 8208 xbr is the most accurate load to date out of this rifle. I worked from 22.5 gr. up to 24 gr.  with all showing sighns of good accuracy. I really like the 24 gr load of 8208 xbr with the 60 gr v max accuaracy was consistantly between 1 1/16 and 1 1/4 " at 100 yds . This is probably about as good as I can shoot with a 1X4 accupoint with the German cross hair. I was getting 2709 fps av. on my crono with this load , and it showed no exessive pressure sighns for me.  Extreme spreads for 5 rds. were running in the low 20's.

While I could get more velocity with tac and the 60 gr v max ; the accuracy wasn't even close to the 8208 xbr.

I also tried the 8208 as well as tac and RE15 with 77 gr nosler cc. It  didn't shine here for me. My setup preferred 24 gr tac with the 77 Nosler cc yielding 1 1/2 " groups at 100 yds at 2597 fps. av.

My rifle did not like the 69 gr smk at all. Go figure.

I got my best groups ever with the cheap 62gr lead core milspec bullets wideners sells using 22.8 gr of 8208.  I'm gonna do some more testing but this looks like it may be my new plinking load.

I shot some in 308 and 25 WSSM yesterday. No phenomenal groups, but I'll try and get some data posted up soon.

What charges are you using with the 25 WSSM?

[Insert typical disclaimer here]
Like any load data, you need to work up, but this was the first time I ever had absolutely nothing to go on except load data for the 223 WSSM and the 243 WSSM. My first outing I think I was on the low side, so I bumped it up a little this time out. Using the 100gr Sierra MK I used loads of 37gr, 38gr and 39gr with good success. As I have heard, the WSSM brass is very hard to tell any over pressure signs, and mine looked fine.
I spoke with a tech at IMR a while back and he said the load density was not ideal with bullets 100gr and up with the 8208 powder. I also shot 2 loads with 87gr Bergers. If I can get the formatting right with this web site I'll post up the chrono data, I'm too lazy to type it all (rather than copy and paste, lol).
Here is my data from the other day for the 25 WSSM.





String 22

87gr Berger

39gr IMR 8208                    

     1)    3102        

     2)    3092        

     3)    3122        

     4)    3099        

     5)    3114        



        High:    3122        

         Low:    3092        

        E.S.:    30        

        Ave.:    3105.8        

        S.D.:    12            



String 23

87gr Berger

40gr IMR 8208                    

     1)    2989        

     2)    3028        

     3)    3031        

     4)    3011        

     5)    3033        



        High:    3033        

         Low:    2989        

        E.S.:    44        

        Ave.:    3018.4        

        S.D.:    18.6        



String 24

100gr Sierra

37gr IMR 8208                    

     1)    2855        

     2)    2783        

     3)    2865        

     4)    2762        

     5)    2815        



        High:    2865        

         Low:    2762        

        E.S.:    103        

        Ave.:    2816        

        S.D.:    44.5        



String 25

100gr Sierra

38gr IMR 8208                    

     1)    2920        

     2)    2864        

     3)    2928        

     4)    2858        

     5)    2875        



        High:    2928        

         Low:    2858        

        E.S.:    70        

        Ave.:    2889        

        S.D.:    32.6        



String 26

100gr Sierra

39 gr IMR 8208                    

     1)    2959        

     2)    2934        

     3)    2977        

     4)    2972        

     5)    2943        



        High:    2977

         Low:    2934

        E.S.:    43

        Ave.:    2957

        S.D.:    18.4