264 Winchester magnum

[Luckyducker]

I looked at data for 140 grain bullets for the 264 and every source that I have for H1000 powder showed a max load of 68 grains including Hornady's manual, except for one manual that I have forgotten which gave a maximum load of 65 grains.  I figured that Hornady data would be accurate since it was their powder. (yeah, there I go thinking again)  At 65 grains under a Hornady IL 140 flatbase everything looked fine but when I shot a 65.5 grain charge the primers flattened and the FP almost prierced through the cup.  The accuracy with the 65 charge was a hair under MOA but I think I will try some boattail bullets and start a couple grains lower with the next batch of test loads.  BTW, the chrono showed between 3100 and 3150 with 65 grains.

[jhalcott]

  Lucky. you PROBABLY  did NOT read the part that says START low and work up!

[Graybeard]

Hornady makes BULLETS not powder. That would be the other "H" company Hodgdon. 

[stimpylu32]

Luckyducker

Just another case of what the BOOK lists as max may not be max in your rifle , thats about 5% below what the book said max was so keep that in mind when you work up your next loads , and start at about 10% less than BOOK max to be safe .

stimpy

[Luckyducker]

Greybeard, yeah I had a brain fart, I meant Hodgdon's data manual.