Orcon
Member
So after a year or so of reloading, and having worked out most of the basics without grievously injuring my self or others I have finally succumb to the accuracy bug. I had heard of various forms of OCW testing and ladder testing. I settled on the Dan Newberry method because it seemed the most straight forward and most commonly known by those I shoot with. The first shot group is a combination of sight in/ foulers and post test confirmation with a hunting load of 165 gr SST and Varget, ten rounds in total. From there we go to 3 shot groups looking for center mass similarities across several groups, not necessarily smallest group size.
Distance 105 metres (115 yards)
The rifle used in this test is a .308 WIN Remington 700 SPS "tactical" 20" bull bbl and crappy hogue stock on a Harris bi-pod. It is nothing fancy.
The load materials used are:
Hornady match brass
175 gr Nosler Custom Comp (courtesy RMR Bullets)
Hodgdon Varget powder
WLR primers
Seated at 2.86 COAL
Powder charge for shot groups left to right:
(165gr SST hunting load for control/sighting 10 rounds total)
45.3gr
45.0 gr
44.7 gr
44.4 gr
44.1gr
43.8gr
43.5gr
43.2gr
I am going to go with the two in the middle that are high and slightly left of center, 44.4 and 44.1 grains.
My results were some what surprising to me, I expected more rise from higher powder charges. I think I might try this same test again at 200 or maybe 300 metres. What do you think?
Distance 105 metres (115 yards)
The rifle used in this test is a .308 WIN Remington 700 SPS "tactical" 20" bull bbl and crappy hogue stock on a Harris bi-pod. It is nothing fancy.
The load materials used are:
Hornady match brass
175 gr Nosler Custom Comp (courtesy RMR Bullets)
Hodgdon Varget powder
WLR primers
Seated at 2.86 COAL
Powder charge for shot groups left to right:
(165gr SST hunting load for control/sighting 10 rounds total)
45.3gr
45.0 gr
44.7 gr
44.4 gr
44.1gr
43.8gr
43.5gr
43.2gr
I am going to go with the two in the middle that are high and slightly left of center, 44.4 and 44.1 grains.
My results were some what surprising to me, I expected more rise from higher powder charges. I think I might try this same test again at 200 or maybe 300 metres. What do you think?
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