Although I don't think much of them for terminal performance, PBs are normally pretty accurate. I would try going up to the 295 gr and dropping your powder and see what happens. That would be my minimum weight for deer and 348 would be minimum for elk. But since the 348 flies almost as flat as the 295, you might as well jump to the 348 and not have to change bullets later.

Definitely drop to 90 gr or 95 and see what happens. My elk load is 90 gr of 3fg 777.

Also, the lead sled doesn't give at all, so if you are not exactly straight with the sled, it can throw your shot off. I have gone to using mine with NO weight, just the sled and that seems to work well for me. But just for grins, you might just try and go with a sand bag set up and see if that make any difference.