Unless someone is saying they experienced a hang-fire situation
6.5x47 17 pound 1000 yard bench gun.
140g Berger LRBT VV540 and Tula small rifle magnum primers.
15+ degrees F.
Hang fires.
Click and then a bang.
Very uncomfortable feeling.
Above 50 degrees no problem with Tula..
I have shot the 6.5 SLR based on 308 lapua palma case( bigger than a -47 case) down into the 40s usuing CCI 450 Mag primers with no issues.
Test before before you trust..
dave