Help with Flinch

[Troutguide]

I have hunted with .30-06 for 25 years and had great success. The first rifle i hunted with was my Fathers Rem. 700 and it had a super light trigger pull which I was good with. A few years ago I inherited a Ruger 77, the trigger is much heavier and I shot it a little and hunted with it the last few seasons, however I have developed or possibly had already developed a flinch when I shoot. So bad I started missing deer at close range. This has led me to the Grendel for a lower recoil alternative and a better trigger. I purchased a Howa 65G and am loving shooting it. I am working on the flinch with snap caps and lots of rounds down the range. I am able to shoot 1" groups at 100 with it but still have issues with the flinch at times. I recently took it hunting for the first time and killed a hog at 60yds with a perfect head shot. This was after trying to shoot with the safety on and flinching badly, so reminding myself to breath correctly and pull smoothly I nailed it. That evening I had another hog at 60 yrs and was worried they were going to bolt so I made a rather quick shot and missed. I assume I flinched again bc I didn't tell myself not to.

How do you work on the flinch for live targets and quick shots? Any tricks to fix the flinch? Like I said I can control it now at the range and do fine with snap caps its just the real life situations that it seems to come back. I used to shoot archery a lot and developed target panic, I was able to mentally correct that with practice holding on target and shooting to different counts mixing up how long I held on target before releasing. So I know I can overcome this too, just looking for advice on the best way?