06-27-2021, 11:26 PM
Banjo,
Your current load is hot. Your actual case volume will be slightly different to Quickload's default but it is showing 105% case full at 28.2gn/8208 and 2.250" OAL with that bullet. The pressure is up around 63.4K lbs. It is more than the light action is designed for and while you may be OK it may break the bolt - sooner or later. Hard to say when it will break and also depends on the quality of your parts.
8208 is unforgiving once it gets compressed and 105% is definitely compressed. The pressure curve gets steep real quick.
I don't think 8208 is suitable for the heavier bullets and also not the most efficient for that long barrel. You'd be better off with 4895 - no more than 27gn if you want peace of mind. If you don't mind the idea of replacing parts if they break then you can experiment with hotter.
New gun, different barrel length, different chamber dimensions = new work-up.
How are you determining your muzzle velocity?
Your current load is hot. Your actual case volume will be slightly different to Quickload's default but it is showing 105% case full at 28.2gn/8208 and 2.250" OAL with that bullet. The pressure is up around 63.4K lbs. It is more than the light action is designed for and while you may be OK it may break the bolt - sooner or later. Hard to say when it will break and also depends on the quality of your parts.
8208 is unforgiving once it gets compressed and 105% is definitely compressed. The pressure curve gets steep real quick.
I don't think 8208 is suitable for the heavier bullets and also not the most efficient for that long barrel. You'd be better off with 4895 - no more than 27gn if you want peace of mind. If you don't mind the idea of replacing parts if they break then you can experiment with hotter.
New gun, different barrel length, different chamber dimensions = new work-up.
How are you determining your muzzle velocity?