Did some more shooting.... ;-)
All I have to say is that I tried different powders... with different charge wieghts and never got a bigger group than .5
That is a testiment to the way Mr. Matthews builds a rifle... I am not even done with break in and this this is a screamer!
this is using the 220SMK
heres a load of
H 4831 SC 68.5 grs. + 2710 fps Avg.
1 fowler and a 3 shot group!!
Here is a group with H1000 74.0 grs = 2770 fps
1 fowler and a 3 shot group