I need some serious help here. I am trying to develop a good load for my .308 and am running into roadblocks at each attempt. I am desperately trying to use some 169.5 gr uld rbbt tapered jacket bullets and have started with a ladder test. That progressed to the next step of shooting 3 shot groups to confirm an accuracy (and somewhat a velocity) node. That failed miserably. Then I started at the top of that 3 shot test and continued with several more 3 shot groups that pushed the bullets into the 2840 fps area and showed definate pressure at the highest load. those groups were as bad as the previous test.
I have 18 bullets left out of 100. I am considering loading 3 shot strings starting at the bottom of the first confirming shots and going down in velocity to see if my gun is asking for a certain pressure/velocity below where I have been looking or I am considering trying a different powder altogether and loading from that powders max down in .3 grain steps then shooting upward while looking for pressure and good groups.
What do you guys think I should do?
BTW at the end of the last day at the range, with 27 shots through the gun, with a warmish bbl and a growing crosswnd and noticable mirage, I shot a 3 shot group of identical wildcat bullets except for these had a J4 jacket and were loaded with H335 at about 2600 fps. This group was a solid 1.5" triangle (at 300 yards) and less than half the size of the best 3 shot group fired with the above trial loads so far.
I have 18 bullets left out of 100. I am considering loading 3 shot strings starting at the bottom of the first confirming shots and going down in velocity to see if my gun is asking for a certain pressure/velocity below where I have been looking or I am considering trying a different powder altogether and loading from that powders max down in .3 grain steps then shooting upward while looking for pressure and good groups.
What do you guys think I should do?
BTW at the end of the last day at the range, with 27 shots through the gun, with a warmish bbl and a growing crosswnd and noticable mirage, I shot a 3 shot group of identical wildcat bullets except for these had a J4 jacket and were loaded with H335 at about 2600 fps. This group was a solid 1.5" triangle (at 300 yards) and less than half the size of the best 3 shot group fired with the above trial loads so far.
