Too cold and windy to go check now so thought I'd ask the audience.
I'm shooting a CZ 527 Varmint 1:9 w/24 inch bbl for my NOE 225-65FN GC in front of 11.0 Gr of IMR 4227. I'm getting boolits lubed and checked from 63.2 to 63.7 grains. I've consistently shot groups of 1.25 inches at 100 with occasional groups of sub .75 When I first got my rifle I shot 40 grain Z-max and got consistent touching groups so know the rifle is capable of great accuracy.
I haven't separated and shot my cast boolits in .1 grain increments and just loaded and shot - so some may be on the low end and some on the high.
NOW to the question: What is the impact (if any) on accuracy with weight differences of .5 grains or less on this bullet? Would weighing them and shooting only those that weigh EXACTLY the same make any NOTICABLE difference? Hope someone has already tilted at this windmill and can provide some insight.
All boolets have been visually inspected so exterior defects are not a problem - also, all cases are trimmed, de-burred, and like makes of brass. Clean primer pockets also. I have played with crimp and settled with one that seems to provide the 'cleanest' burn but lightest hold to pass the bench press test. Seated as far out as possible without exposing the top lube groove.