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Right, finally have some time to get the .450 No. 2 shooting. Load is: .450 No.2 NE Bullet: 480 gr Woodleigh RNSP Case: Bertram Primer: 215M Federal Powder:AR2213 SC Load was 105 grains of powder with a black foam filler. All the filler burned up nicely leaving no residue. Previously shot the rifle using 100 grains - four shots for familiarisation and test for any pressure problems. Temperature was 30 deg C with humidity and GALE force winds. I picked the shots in the gaps in the gusts. Rifle was rested on a Landcruiser bonnet with my hand and arm on the rest holding the rifle off the surface. 25 yards. Fired a left and right. 1 1/4 inch group horizontally side by side, but almost 5 inches above the point of aim. Vertically in line with point of aim. 50 yards. Fired four shots. 2 left and 2 right. 3 shots into 1 inch asanice cluster with the second right barrel increasing the group to 3 1/4 inches. This of course may have been my mistake or the very strong winds having some effect. 3 shot cluster is 7 1/2 inches above the point of aim. 1 1/4 inches to the left (wind was right to left). Cronograph showed plus and minus around 2100 fps. Pressure looked OK but primers were being damaged on opening the rifle by protruding firing pins. Only made up the 6 rounds of this load. Didn't try to shoot out to 100 yards as the wind was very strong and picking the gaps would have been harder as the distance increased. Plan on increasing the load to 107 grains and see if it drops the point of impact, but do you think there is evidence the rear sight needs to be lifted? Will try to post some photos tommorrow. |