Really depends on what distance you'll do most of your shooting at. +/- 2 1/2" groups @ 50yds used to be the gold standard.
It really comes down to how well your revolver responds to the cast/hard cast bullets you're using. It's not uncommon to bump up loads .2gr's when using cast bullets compared to the soft pure lead swaged bullets.
Then there's the consideration of how fast you need to reload the revolver. Some prefer a nosed bullet for speed loading, others use flush wc's/hbwc's. For general range play it really doesn't matter.
Hopefully everything works out for you with the simple bullet swap/same powder. If it doesn't bumping the powder up is your next option. I've bought swaged lead bullets in the past along with swaging my own bullets. I've also casted bullets for decades using 8/9bhn alloy. The 2 main bullets I cast were the lyman 358311 158gr rn bullet and the H&G #50 148gr button nosed wc.
I typically had to use .2gr more of bullseye or AA452 when using my cast bullets compared to any of the swaged bullets.
Bullseye powder 158gr rn bullets 3.1gr swaged 3.3gr cast
AA452 powder 148gr hbwc/wc 2.9gr swaged 3.1gr cast
Used to only own 1 set of dies for the 38spl/357's. Took awhile but I saw the light and bought multiple seating/crimping dies and gunshows (+/- $5 apiece). That way I had dies setup for specific loads and other dies for testing different bullets.
My ppc revolver built from a model 10 frame. If you look at the rear of the revolver your pre-14 will have a slot for a rear sight. My frame has a rounded groove/iron sight setup.
If you decide to test other bullets for your ppc revolver a type III wc is always a good choice. Cramer #19 and the heavy version of the lyman 358432 are excellent choices. They have a tapered nose that aids when using speed loaders but still maintain hbwc/wc accuracy.
Myself I switched over to a 357 and simply play around on the ranges.
Old habbits are hard to break, I still use 3.3gr's of bullseye and a 158gr cast bullet in the 38spl cases. A lot of people don't know it but 3.5gr of international clays and a 158gr cast bullets is another load that has served me will in several 38spl/357 revolvers over the decades.
The bullet used to shoot those groups pictured above is a 158gr rnfp hp bullet that has 2 crimp grooves. I seat the bullet long (crimp in the bottom crimp groove) when using them in the 38spl cases. If I take the hp pins out of the mold and put solid nosed pins in the mols casts a 170gr rnfn bullet.
Target looks like junk, was shooting it for my own amusement. Playing around on the 50yd line using that same (640 series) bullet pictured above. I also used another 158gr rnfp hp bullet that I cast, an old cramer bullet designed for the 357 called the hunter.
These are 6-shot groups @ 50yds testing 5.5gr of bullseye (left upper/lower targets) and 6.0gr of bullseye (right upper/lower targets). The hunter bullet was used for the top left & right targets. The mihec 640 series was the bottom left and right targets.
Really didn't matter the load or the bullet, all 4 test loads held 2 1/4" or less. (putting out there 5.5gr to 6.0gr of bullseye and a +/- 160gr lead bullet in 357mag cases is worth trying).
Enjoy that fine ppc revolver & hopefully you do testing with different bullets besides a dewc.
