If you have an old Alliant soft cover reloading manual it shows 115 grain bullet with a maximum of 4.7 grains of the Alliant Green Dot. Of course is says to start 10% lower than max. so 4.3 to 4.7.
A three die set, sounds like you are seating and crimping at the same step, is that correct? If that's what you're doing, that could explain the accuracy problems you're experiencing. Crimping (taper) should be done as a fourth and separate step from bullet seating. I did it this way for several years and had the same problems you posted. My suggestion is to get a taper crimp die and apply it as an additional step in the loading process. I use a LEE factory crimp die, the one with the carbide insert at the bottom of the die. The carbide ring will usually iron out any small discrepancies (Glock bulge) the case may have if you use range brass of unknown pedigree. Replace the POS LEE lock ring with a good split ring and you're ready to make ammo. Just remember to back the seating die out so it no longer tries to crimp when seating bullets.
