I have shot a LOT of 3/4oz at ~1200fps through my Browning XT and never had a problem with the inertia block not transferring. These loads will not cycle any auto, gas or inertia, that I have tried them in.
Anecdotal evidence, (forum discussion) says that 7/8 and less is not reliable, but that really depends on energy, not payload.

May try some .75s at 1000fps to see if fire control still functions

K

 

I have shot a LOT of 3/4oz at ~1200fps through my Browning XT and never had a problem with the inertia block not transferring. These loads will not cycle any auto, gas or inertia, that I have tried them in.
Anecdotal evidence, (forum discussion) says that 7/8 and less is not reliable, but that really depends on energy, not payload.

May try some .75s at 1000fps to see if fire control still functions

K

Yea, I do have the bushings to load a 3/4 oz at about 1150 with powder I have but I haven’t bought any wads to try them out.. Didn’t really want to get into a situation where I experiment with wads and get a bad stack height and then have to buy a specific powder to chase something out of curiosity that might not shoot in my gun. 🤦‍♂️

 

I shoot 3/4 oz 12 gauge shells a lot, in a variety of O/Us. Never a problem with resetting triggers. Occasionally I have a fail to eject in some semi-autos. Because they are such soft shooting, and benefit from a bit more velocity, to break targets, I bump up the speed, which also helps in the semis.

 

even Skeet guns that are "tubed" don't need the inertia block altered until you get down to .410, so if 3/4oz 28ga is not a problem I doubt any 12ga load could be.

 

Depends upon the gun. I have loaded 3/4 oz loads soft enough so that they would not reset in the Beretta SP I had at the time but they worked fine in my Browning Superposed. I can not recall a 7/8 oz load that did not reset my guns. All the 7/8 loading data available seems to be for 1200 plus fps.

 

This is the recipe that I was using for 7/8 oz and the way the bushings worked out dropping titewad was +/- 15.0 grain. Guessing it would be under the 1200 fps mark. But you are correct all the published data on hodgdon site for at least the powder I am using starts out 1200.

 

Here is what I found for a 3/4oz load I’m contemplating.

 

I shoot this load regularly for 16yd and 1st shot doubles. Such a soft shooting load & very economical to load. Full choke, Breaks birds dead.

 

That’s same pressure and less payload. Which should create even less recoil.

 

I shoot 7/8 oz loads in my Beretta SP and there is no issue with resetting the trigger

12 ga

Win AA hs

7/8 oz

Cheddite

Alliant Extra Light

14.4 gr

CB 1100-12

1,150 fps

6,970 psi

.