Had a 6mm creed built last year. Rifle is a Kelbly atlas tac short action, bartlein 27” medium Palma, manners t5, tt diamond. I put a load together, 42.8grs of h-4350 at 3137fps from 120 rds to 260 rds down the bbl. shot like a house on fire. Towards the end of the 260rds my velocity and pressure spiked a bit, accuracy went way down hill!! Cold weather hit and it sat for the winter.
fast forward till this past Saturday. All brass is fl sized, bumped .002. I cleaned the rifle like crazy. Loaded up a few at 42 for Fowler’s. Then did a later test at 300 yards. Results from Saturday showed 42-42.6 showed a node with an Es of 7 and a velocity of 3172. Loaded up a few at 42.3 and back out Sunday to start testing.
average velocity sunday was 3203 with an average sd of 4.5 but groups were terrible. Basically 1 moa. Confused by the results I figured I must of made a mistake and picked 1 round from each group and set it aside and pulled it at home to double check, and 42.3 grs.
Re loaded and did another ladder. Velocities were different by a good amount again. Nodes weren’t visible,
Shut off my Lyman scale (just to throw the main charge then trickle onto gempro for accuracy) figuring maybe the Lyman is throwing off the gempro.
loaded up 2 more ladders tonight and once again results were different again!! Node isn’t nearly as visible but might have something. I have no idea what’s going on or how to proceed. I hate how much the gempro drifts and how the Lyman isn’t all that accurate. I finally just ordered the a&d fx-120i v3 combo for piece of mind but won’t be here for 4-6 weeks.
how do I proceed and what should I be looking at.
