Satterlee 10 Round Load Development

[centerfire]

Centrefire,

To clarify - I shot at 100 (not 300), using H4895 (not 8208), I have shot a 15rd group with that Tightest Group load (it is on the page: the left hand column), and I am an F-Class shooter too. I agree, I wouldn't use H4895 or 8208 either; I prefer Varget, we all did.

At least we also agree that 10rds is not enough to discount any load from being possibly the best. We agree that shooting is a game of statistical averages. The more you shoot, the more valid and therefore generalisable the results.

I agree with you that the low SD's surrounded by higher SD's are potentially a statistical anomally, as is that great, but anomalous group. I acknowledged this by replacing it with the next best group for the long range simulation. I agree, more rounds need to be shot. But then again, Satterlee is saying look for the low SD's and once you find this focus on them, only. But how do you explain the best group coinciding with the second best SD, is this a validation of Satterlee or not?

I maintain that due to barrel harmonics and whip that bullets in a group can come out with the same MV but still be pointing in different directions. Satterlee with a focus on velocities only does not take this into account. I am convinced it is not correct in all situations and that means it is useless to me because without being able to discount results on a target I can never be sure the lowest SD is the most precise group.

I think we pretty much agree on all of it. I think it just comes down to luck sometimes. In other words, sometimes the 10 shot method identifies the node and sometimes it doesn't. I used it successfully on a 308 load with 150NBT; I was in the best node in 10 shots. The next rifle it took multiple powders and bullets and the 10 shot method never identified anything other than how to spend money and time at the range.

Like I said on page one, I only use it to record velocity and look for pressure.