6mm ARC - "Optimum 6mm" & Powders & Lapua Brass
#28
(03-09-2023, 01:51 PM)GRH Wrote: But what of Varget?
It's right there near the same burn rate, albeit ever so slightly slower. GRT prediction with a 105gr, well over 90% case fill with my measured cases, mid 90's burn rate, efficiency 29% with a more room to go before peak pressure (gas gun).

Varget also works great for me. Phenomenal accuracy and low SD. I only do about 2450 out of a 16" Lilja* with 105 gr RDF's, but my zero and dope has never been affected in practical matches out to 700 yards where the temps have been as low as the high 40s up to over 100. I've run the same charge over 4 seasons in the Phoenix climate.

* I've never heard anyone call their Lilja barrel "fast".
#FJB
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