308 pressure issues

[Bambistew]

When I work up new loads, I generally go to a few different sources and compare max loads. Also note the case type. Different manufactures have different capacities.

I just looked at Hodgdon website, they list a max of 47gr with a Nos BT, and 46.5 with the Partition. The load for the BT is just under SAMMI "max" pressure of 60,400psi. These also are using Winchester cases, which generally have the largest capacity.

In the end, I let the rifle do the talking, but generally don't push it too much. Brass tends to last longer.

 

[Ben Lamb]

I looked back at the manual I was using and thought I'd share what I found. I guess it's more important than I thought to update reloading manuals.

FWIW, I have reloading manuals that go back to the 1950's & 60's for some of the obsolete cartridges I have but I generally take all manuals with a grain or two of salt. Formulas on powders change, different batches produce slight variations on how the powder works, etc & some rifles just don't like max-charges. Sounds like the Howa doesn't like that max charge and dropping 10% and working up, while tedious, tends to keep your gun in 1 piece.

Good luck!

 

[AussieHunter]

Try ADI 2206h or Hodgdon 4895 as it is known over there. It will be good for projectiles up to 150 grains and get the velocity right up particularly in 20 and 22 inch barrels.

 

[HunterRebellion]

Sounds like the rifle may have excess head spacing.

That's exactly what I was thinking. Maybe have a gunsmith take a look or send it back to Howa if it's feasible.

 

[belly-deep]

Reloading without a chronograph is a fairly blind endeavor

 

[okie_hotrod]

Reloading without a chronograph is a fairly blind endeavor

Not really, once I get a good load I take it out to some marked distances with a ballpark MV and true it using the observed trajectory.

 

[belly-deep]

Not really, once I get a good load I take it out to some marked distances with a ballpark MV and true it using the observed trajectory.

Still going to have a hard time deciphering pressure.

 

[Altitude_Freak]

Not really, once I get a good load I take it out to some marked distances with a ballpark MV and true it using the observed trajectory.

Or spend $200 and do it the easy and accurate way?