My data may be outdated...I've not reloaded for the 52 in many years. I had great success with the 148gr HBWC, and found Spear and Hornady to make the best heads.
The Spear product was longer and seemed to have the most potential bearing surface, something I am confident leads to improved stability in flight. The liquid alox lube was tacky on my fingers and the process was dirty as compared to the Hornady heads.
The hornady heads were shorter but held dry lube due to a texture on their surface (as opposed to the grease grooves on the spear heads). I found the dry lube most easy to work with. (Head placement in the seating die was improved for me because the heads didn't stick to my fingers.
I am a believer in Bullseye powder (though again I have not shopped other types that may have been offered in recent years). 2.8 grains of Bullseye with a fairly aggressive roll crimp worked well. Good function, accuracy and an addictively tame recoil.
I tried to make my crimp flush seated with the bullet but had good function even if a slight amount of lead protruded. I never liked the idea of the brass edge striking the feed ramp so I made a point of not allowing the bullet to seat below the crimp. Others have done this with success though.
Good luck. There is nothing cooler than feeling the recovery of a 52. If you're focused, you can feel every stage of the process as if in slow motion...recoil, ejection, reload and lockup.