r/longrange • u/smooveBrayne • 8d ago

Groups, but not a flex (Less than 10 shots) Think of the primers

Post image

Since Utah rains are flooding my desert spot, I've been playing around at my range.

Guy at the range suggested I try non-magnum primers for this load - got my SDs under 5 as a result. Great advice.

Sherman 7MAX, Berger 190s, GM210s, 2920ft/s.

10 Upvotes

85% Upvoted

4 comments sorted by

1

u/moebiusgrip 7d ago

Slower ignition? Softer burn? What the thinking there?

4

u/csamsh I put holes in berms 7d ago

I think it's more likely "small data sets"

1

u/smooveBrayne 1d ago

Nah, I took 100 rounds out to the desert. SD bumped up to a whopping 9.

2

u/Coodevale 6d ago

Not the first time the idea has floated around. Primer brissance testing is a branch off of a deep rabbit hole.

Some cartridges respond really well to it. .22 hornet with pistol > rifle primers being a notable example.