Got my rifle for about a month now and finally got all the components together to test and shoot my reloads out at the 600 yards range.
The equipment in question is an 18” OBR with Harris BRM-S bipod, CTR stock with RISR and POD, Accu-Shot BT13-QK monopod, SureFire comp, LT-104 scope mount, and NF NXS 8-32x56 scope. Handloads consist of new Win brass, Remington 9 ½ primer, Varget, and 175 gr SMK seated to OAL of 2.800.
The first test consist of single rounds with eight different Varget weights – 42, 42.5, 43, 43.5, 44, 44.5, 44.75, and 45 gr. shot as a ladder at 100 yards to look for sweet spots and pressure signs. The eight shot grouped tight with a max spread of 1.5 MOA with the three closest lateral round being 43, 43.5 and 44. Slight primer flattening and cratering observed at all weights with slight extractor marks at the highest two powder weights.
The second test consist of firing two five round groups with powder weights of 43 and 43.5 gr of Varget again at 100 yards. The max grouping spread of the two groups respectively were 0.827 and 0.961 MOA. (for reference, the LaRue supplied target had max grouping spread of 0.835 MOA with five rounds of FGGM).
The third test consist of firing one 10 round group with powder weight of 43 gr of Varget at 100 yards with max grouping spread of 1.207 MOA. Mean MV captured with a chrono was 2463 ft/sec with a SD of 25.25 and SE of 7.95. Shooting conditions were as follows: Temp 61F, humidity 44%, dew point 39F, barometric pressure 30 inHg, altitude 1100 feet.
The fourth test consists of firing 18 rounds with 43 gr of Varget at the 600 yards range. Range conditions was wind 4 mph (cross), temp 79F, humidity 41%, dew point 77F, barometric pressure 30 inHg, and altitude 1100 feet. Elevation adjustment calculated with the above information and a NF Ballistic software ended up being 18.5 MOA of elevation adjustment with turned out to be accurate, hitting the 9 ring at 10 O’clock. The score tally for the 18 rounds was 174 out of 180 points with four Xs, ten 10s, four 9s, and one 8. Max grouping spread was approximate 2.7 MOA
All in all very happy with the rifle. My reloads preformed well but did have a few fliers in both the 100 yard 10 round group, and the 600 yards test so I will have to work on those.
The equipment in question is an 18” OBR with Harris BRM-S bipod, CTR stock with RISR and POD, Accu-Shot BT13-QK monopod, SureFire comp, LT-104 scope mount, and NF NXS 8-32x56 scope. Handloads consist of new Win brass, Remington 9 ½ primer, Varget, and 175 gr SMK seated to OAL of 2.800.
The first test consist of single rounds with eight different Varget weights – 42, 42.5, 43, 43.5, 44, 44.5, 44.75, and 45 gr. shot as a ladder at 100 yards to look for sweet spots and pressure signs. The eight shot grouped tight with a max spread of 1.5 MOA with the three closest lateral round being 43, 43.5 and 44. Slight primer flattening and cratering observed at all weights with slight extractor marks at the highest two powder weights.
The second test consist of firing two five round groups with powder weights of 43 and 43.5 gr of Varget again at 100 yards. The max grouping spread of the two groups respectively were 0.827 and 0.961 MOA. (for reference, the LaRue supplied target had max grouping spread of 0.835 MOA with five rounds of FGGM).
The third test consist of firing one 10 round group with powder weight of 43 gr of Varget at 100 yards with max grouping spread of 1.207 MOA. Mean MV captured with a chrono was 2463 ft/sec with a SD of 25.25 and SE of 7.95. Shooting conditions were as follows: Temp 61F, humidity 44%, dew point 39F, barometric pressure 30 inHg, altitude 1100 feet.
The fourth test consists of firing 18 rounds with 43 gr of Varget at the 600 yards range. Range conditions was wind 4 mph (cross), temp 79F, humidity 41%, dew point 77F, barometric pressure 30 inHg, and altitude 1100 feet. Elevation adjustment calculated with the above information and a NF Ballistic software ended up being 18.5 MOA of elevation adjustment with turned out to be accurate, hitting the 9 ring at 10 O’clock. The score tally for the 18 rounds was 174 out of 180 points with four Xs, ten 10s, four 9s, and one 8. Max grouping spread was approximate 2.7 MOA
All in all very happy with the rifle. My reloads preformed well but did have a few fliers in both the 100 yard 10 round group, and the 600 yards test so I will have to work on those.
