Nothing to lose, keep us informed.
It is why I never use a mag primer in the .44 with any powder. Mag primers will triple groups. Even the .45 Colt does better with a Fed 150 but WW primers do good in it. I move to the Fed 155 at the .475 and up, even in the 45-70 BFR where it is better then a LR primer.
Primer testing is like everything else we test, powder, lube, case tension, etc. Primers are critical.
Lube is very important too, many just want to stop leading and is all they look for but accuracy is affected more then you think. Here is a test between lubes at 50 yards. Left is a hard LBT Blue compared to Felix lube.
There is nothing I have not tested. I do not clean the barrel between tests either, I just move from one to another.
It is true that I hate Alox in any form but temper with wax and it does work better. Still, there is better. I do not tumble lube anything and use Felix on TL boolits. You should get no smoke or stink from a lube, only powder smoke. Lube must spin off a boolit at muzzle clearance so the grooves are clean. A layer should remain in the bore so the next shot cleans everything out. Alox burns and leaves ash in the bore.
A very slippery lube will break case tension in a revolver before good ignition so you need some "sticky." Lanolin works best.
Primers vary in force so you do not want primer pressure to move a bullet/boolit before good ignition. You change airspace.
Federal makes very accurate .44 ammo. I called them and the nice lady checked records to find Fed NEVER used a mag primer in the .44.
A friend brought factory cast .44 loads here, I shot them and told him they have mag primers. He said NO, he knows the owner so I called and was told YES, CCI 350's. I lost my friend over it. Can I tell the difference? yes I can. I posted and was told I humiliated him but truth is more important.
I was kicked off the SA site, then lee Martin came to shoot and seen what I did with a revolver. He wanted me back but I refused. Taffin is there and attacked me as did his followers.
I do not lie, NOT EVER!
It is so bad I was booted from Graybeard when I had forgot I was a member for years and years. Could not sign in. I know Veral Smith so I called him. He said he does not know why, came from higher up.
If you want to learn cast, get books from Veral and toss gun rags and writers as fast as you can. Most are done with the first flush. We lost the best and now they sell products. I want Elmer, Jack O'Conner and Ken Waters back.