Originally Posted by
Semisane
Sproulman, that 70 grain load should be giving you something like 1450 fps. If you sight it for a 75 yard zero it will be about 1.5" high at 25 yards, 2" high at 50 yards, dead on at 75 yards, and 4.5" low at 100 yards.
Those burn throughs with 70 grains are likely due to either the patch being a little too dry or the weave of the patch being a bit loose. What patch material are you using? You should not need a bore button with a patched ball over 70 grains of 3F GOEX.
How did the accuracy compare using 70 grains with the bore button and without the bore button?
The patch pillow tick were just slightly damp I left them in sun..
Ptch material was from Wal-mart .018 pillow tick in blue and I washed them in machine as told before I put Moosemilk Napa grind oil on them.I was happy at how they went in vrs the ox-yoke .018 with preciesion oil ...ox-yoke was terrible had to use a hammer on my starter these I can punch in and nice and tight going in to charge after cutting at muzz...
at 25 yards without bore button the 60 grs touched and 70 grs were a little apart,then i used bore button and 70 grs tighten up ..70 grs had perfect circle with 2 holes in patch near circle put in bore button and the patch looked fine at 70 grs...I punch my own bore buttons with punch...It looked like at 60 grs the balls grouped better than the 70 grs at 25 yards but when I used the bore button at 70 grs groups got tighter....I know RB said never use 90 grs of 3f without a bore button but ok to use 50 grs without button..Too much kick at 90 grs and smoke ......
I am happy so far that it is shooting much better with 2 things moosemilk/cut at muzzle has helped...