.25 pellet head size performance comparison

[bdzjlz]

I am about 2/3 of the way sorting through 10 tins of JSB King Heavy MKII for head size. So far, about 60% are 6.37mm, 30% 6.38mm, and 10% 6.36mm. My goal is to ascertain the accuracy relevance of head size to weight. Once I get them sorted bu head size, then I will sort for weight within .10 grain tolerances and see how much better matched head sizes and weights do compared to just shooting from the tin as they come out.

Yesterday, I took my Skout and shot two groups of each head size, without regard to weight differentials, in near perfect wind conditions. The distance was 86.5 yards. As you can see below, the 6.37 and 6.38 head sizes performed much better than the 6.36. It will be interesting to see how they compare when I have the weights matched as well.

Using a Pelletgage for the sorting. Bought it direct last week and received great service.

 

[rsfrid]

I personally think weight makes more difference on group size. I haven't found head size to make that much difference, except to keep headsizes together. In other words, I don't see much diff between 6.37 and 6.38 except to keep all pellets in a group of same size. Weight makes more difference for me regarding outliers to the group.

 

[Deleted member 50932]

That’s some great work, these are the types of posts that I think over while I’m driving home, pellet size, weights, I think they play a huge part in accuracy as you’ve proven. Thanks for the information!

 

[HogKiller]

It’s good to have a hobby. I’ll hold my opinion until the final results but I think I know what the results will be.

 

[rangur1]

I found that pellet head size matters especially in LW barrels. Some FX liners too , but not as extreme. CZ barrels seem to be most flexible with varying sizes. Either way, you need to match the ammo to the barrel, everyone has it's preference.

 

[bigHUN]

My personal opinion is that the - pellet head size - consistency - is a most important factor.
I did thousands of pellets weight sorting and head sorting and rolling sorting, and just got tired of that game.
I have also sluged my liners, I have all the numbers, but
when I started comparing all these sorted pellets, the re-sized OD (to any random number about couple microns overlap) show me the consistent tightest groups.
I shoot all these tests @ 100 meters over many weeks, and the Impact was mounted on a rail rest at least to eliminate the human errors.