Mate, probably not what you want to hear, but the best way to tame recoil is to increase rifle weight. It is possible to add weight temporarily, inserting lead inside a hollowed-out buttstock or barrel-channel.

Apart from this, a thick sorbothane recoil-pad is essential. The best ones are the pommie 'Absorb-all', but not sure whether they're still imported. Second-best is probably the Pachmayer 'Old English' pad as thick as you can buy.

After this, we get to magna-porting, which really works but is a two-edged sword: the increased muzzle-blast will deafen you if discharged without ear-muffs. Mercury recoil-reducers can also be added to the hollowed-out buttstock, they add weight too and apparently work OK.

For range shooting, PAST make a sorbothane pad to stick inside your shirt, a web-search will turn up the details.

That's about it I reckon, other posters may have more to add. Anything to avoid giving-up shooting....!

Good luck!