If I may suggest, it strikes me that no matter what bullet you are using or the load, you are going to have to find a suitable shooting hold that works for any rifle you are shooting in a particular disciple. Now I can say from experience, we have all "played" with various positions of how we set the rifle on the rest, and where we set our rear bags, even to the extreme of trying different bags bot on the front rest as well as our rear bag and where we set the rear bag in terms of the position of contact on the rear portion of the stock.
Like you, I always makes sure the front of the forend is pushed (pinned if you will) against the front stop for every shot taken. To that, I even tested putting a round rubber over the hardened plastic stop to see if that helped. I wasn't happy with that so I went back to using the plastic covered stop. I have changed the material on the bags I use and they all now have the "Super Slick" material used by many of the top serious competitors in Benchrest shooting. And that's both the rest bag(s) and the rear bag. As for how hard the rifle is held in place on the front bags, I tighten the side adjusters hard against the forend of the stock and then back off enough to allow the rifle to smoothly side back and forth on the front and rear bags. Too tight is no good (doesn't allow for natural recoil) and not too loose allowing for slop.
And as for recoil, rifles must be allowed to recoil in a straight line (and return to battery), so I slightly lean into the rifle stock pad, but not hard enough to forcefully pin the rifle against the front stop. That is something that each shooter has to develop in terms of a "feel". As for my shooting hand (the only hand touching any part of the rifle itself), I wrap my little finger plus 2 more lightly around the stock area below and behind the trigger guard with my trigger finger inside the trigger guard lightly touching the trigger so as to only having light contact with the trigger, light enough to feel it, but not strong enough to pull the trigger until I'm ready to "send it."
This is a summary of what I find works for me shooting any of my BR rifles including my 6mmbr which has a 1:8 Kreiger MG Barrel from which I "dispatch" 68 gr Bart's bullets being pushed by VVN133 when shooting 100 yds, which is all I do anymore. Hope some of this is useful to you as I can assure you it took me several years of "playing around" to come up with this "system" that produces me some very good and accurate results, mostly in the low 1's (and less) shooting 5 shot groups. Having done so, I am also convinced the rifle shoots better that I am capable, despite the 50+ yrs I've been shooting weapons of all sorts. In short, I am aware that the weakest link in my system, is me the shooter. Just stating reality. And as another poster stated, might want to read Mike Ratigan's (or Tony Boyer's) book on Accuracy Shooting that might give you some additional ideas.
Good luck and have fun.
Alex