03-19-2020, 09:23 AM
There has been some advice here that the Grendel might not show pressure signs until it's too late.
Primers might look fine, case bases don't expand I suppose, whatever ...
Add to that 8208 powder is said to spike pressures with small increases in load.
Some say you should use a chrony instead to judge whether you're near max load.
Having had difficulty getting 120 Nosler BT to expand and using only a 16" barrel, I was starting to think that unlike other cartridges there could be some advantages to loafing the Grendel as hot as I could. In fact it seems quite hard to fit a book max load in behind a 120 projectile while staying inside magazine length and SAAMI COAL. Has anyone here actually blown up a bolt action Grendel through overloading ?
With a bolt action and good Lapua brass, couldn't it go to similar pressures to the 308 ? I know the SAAMI spec is lower. Is that something to do with the number of 5.56-spec ARs it's used in ?
So, it it really a "low pressure cartridge" and why ?
Primers might look fine, case bases don't expand I suppose, whatever ...
Add to that 8208 powder is said to spike pressures with small increases in load.
Some say you should use a chrony instead to judge whether you're near max load.
Having had difficulty getting 120 Nosler BT to expand and using only a 16" barrel, I was starting to think that unlike other cartridges there could be some advantages to loafing the Grendel as hot as I could. In fact it seems quite hard to fit a book max load in behind a 120 projectile while staying inside magazine length and SAAMI COAL. Has anyone here actually blown up a bolt action Grendel through overloading ?
With a bolt action and good Lapua brass, couldn't it go to similar pressures to the 308 ? I know the SAAMI spec is lower. Is that something to do with the number of 5.56-spec ARs it's used in ?
So, it it really a "low pressure cartridge" and why ?