I had new bullets to find a good load (actually I've had the bullets for a while, but never loaded them yet) and I decided to try the Dan Newberry's Optimal charge weight method.
If anyone is familiar with the method please confirm:
my guess would be the OCW is just under 44,8 since it is the scattergroup and that both 44,4 and 45,2 grouped around the same point of impact (on average)
On the other hand, I'm using a falcon optic that is relatively unused so the knobs are a bit stiff, frozen hands probably didnt help either. As you can see after my sighters and foulers, I decided to turn it down and right a bit to have the shots hit white area(or so I tought). If I went overboard with the windage because I didn't feel the knob enough and the real point of impact is actually more (on average) like the one for the 45,6 and 46,0 load (with the scatter group being 45,2) then the OCW would be 45,6.
Doing a normal load development of course I'd pick the clover leaf, but since I'm trying the Newberry method, I'd like to pursue it till the end.
Oh and also, before I forget; here are the specs
308WIN
fireformed win brass
CCI 200 primer
H4895: 44,4-46,2gr
Sierra 155gr matchking
COL: 2,830 (this seating depth is absolutely arbitrary, my rem 700 chamber is very long as with many other rems, lands would take a cartridge longer than 2,950'', these bullets cannot be seated that far)
Dan Newberry's OCW:
http://optimalchargeweight.embarqspace.com/#
If anyone is familiar with the method please confirm:
my guess would be the OCW is just under 44,8 since it is the scattergroup and that both 44,4 and 45,2 grouped around the same point of impact (on average)
On the other hand, I'm using a falcon optic that is relatively unused so the knobs are a bit stiff, frozen hands probably didnt help either. As you can see after my sighters and foulers, I decided to turn it down and right a bit to have the shots hit white area(or so I tought). If I went overboard with the windage because I didn't feel the knob enough and the real point of impact is actually more (on average) like the one for the 45,6 and 46,0 load (with the scatter group being 45,2) then the OCW would be 45,6.
Doing a normal load development of course I'd pick the clover leaf, but since I'm trying the Newberry method, I'd like to pursue it till the end.
Oh and also, before I forget; here are the specs
308WIN
fireformed win brass
CCI 200 primer
H4895: 44,4-46,2gr
Sierra 155gr matchking
COL: 2,830 (this seating depth is absolutely arbitrary, my rem 700 chamber is very long as with many other rems, lands would take a cartridge longer than 2,950'', these bullets cannot be seated that far)
Dan Newberry's OCW:
http://optimalchargeweight.embarqspace.com/#
