Bad Ass Wallace
05-20-2023, 10:14 PM
"Down Under" in the land of plenty, the availability of gas checks is a matter of if available and how much. Most 25-35cal are over $AU110 per box with 44-45 over AU140 per thousand. (If you think that is expensive, primers are presently $AU175-250/1000). Most big stores only stock the popular sizes.
I size my 303 boolits with an 0.316" sizer and have found that 8mm (32cal) Hornady gas checks crimp on to the boolit shank much better than using the traditional 30 cal ones. Similarly, when I want to add gas checks to my 0.277" boolits I am using 7mm gas checks. Accuracy is not improved BUT the groups are a lot more consistant.
278" cast boolits with 7mm Hornady gas checks
https://i.imgur.com/CtMbKoRl.jpg
I size my 303 boolits with an 0.316" sizer and have found that 8mm (32cal) Hornady gas checks crimp on to the boolit shank much better than using the traditional 30 cal ones. Similarly, when I want to add gas checks to my 0.277" boolits I am using 7mm gas checks. Accuracy is not improved BUT the groups are a lot more consistant.
278" cast boolits with 7mm Hornady gas checks
https://i.imgur.com/CtMbKoRl.jpg