I bought some Titegroup and a powder thrower (no more scoops for me!
) and loaded some +P with 5.0 grains and regular P with 4.5 grains.....shot about 50 or so rounds. The +P recoiled slightly less than the factory loads, but very close..... and both loads felt consistent to me.
I know, I know.....now I mention the 'scoops'. I'll say it before someone else does ---Looks to me like the consistency problem was with your reloading.