Loading for an HK 770 or other roller-locked semi autos

[Carphunter]

I'm going to start trying to make a deer load for my HK 770.

Normally, I'd grab my can of Hodgdon h4350 that I use for everything and start working.

But, I'm wondering if this powder is appropriate for roller-locked weapons.

I know from other sites, that some semi's are very particular about whether they use a fast or slow powder to make their pressure and for the gun to operate correctly.

Just checking to see if someone here has first-hand knowledge on this.

thanks

[Reed1911]

There is but one way to know for sure

[kyote]

I have heard about autos liking certain powders over others.Believe the M-16 had that problem when she 1st dayviewed in vietnam.I have the HK630 and use BLc and H335 keep loads below max and it seems to work sweet.unless some knows fer sure.I would call the folks at HK.