Finally Something I Have Some Real World Experiance In.
Jenrick, This is not all that complicated because MANY people have traveled this road before you.
I started shooting PPC in the mid 70's. I own more .38 wheel guns than I can count in just about any configuration you can think of.
As far as trimming cases, I never did mess with it. For matches, when they allowed it, I used once or twice fired brass. I did separate, but only by Brass and Nickel.
Personal experience tells me that Nickel case have a bit of a tendency to stick and it can frustrate you on the reload under time, brass cases are a "slippery" and I use them exclusively in informal matches.
Bullets, Lyman and RCBS both make a 150 gr. Keith style bullet mold, If you can get someone to roll them for you, or you have the time, patience, equipment, and skill set, they are great. Again, the Keith style bullet helps a bunch in the reload and they group like a madman. Many matches will not let you shoot them. I like the Remington HBWC for reloading, but there are a bunch of options there. Try them all. But when you find one, STICK WITH IT!
Bevel Base, and Double ended WC's are not my favorite, but for short range practice, go for it if it is all you can get. Murphy will always show up when it comes to supplies.
Most often you have to shoot ammo issued at the match, or instructed to bring factory loaded Issued at the match it will be 148gr HBWC, either Federal or Winchester. Rarely Remington. Often it will be nickel cases, so swab your chambers between stages.
I have shot HBWC for years, in both match and practice. It really is the bullet of choice.
As far as loads, the standard for many years was 2.7gr of Bullseye. I have used WW Std Primers exclusively, why, they have fewer feeding problems in my progressive presses, and they are consistent as all get out.
However, we worked up a load with 2.8grs of 700-X and it is the cat's behind. Velocity's lock step with the Bulleye load, burns cleaner and it prints like a house afire. Out of my factory barreled distinguished guns, one ragged hole at 25yds off a Ransom Rest. With my Heavy Barreled open class guns, even tighter. The 700-x also we find shoot at tad flatter, and a tad tighter at the 50yd line.
The loaders that I have used for this load over the years have been C&H Autoload, Star, Phelps, and finally the best overall, the Dillons. I have both the 550b and the 650. Dang I like the Dillon dies. Easy to set up, easy to clean, occasionally you will have to clean you seating dies, as no matter how hard you try, you will occasionally shave a bit of lead. This is with ANY die and wadcutters. If you set the expanding die to flare enough to prevent it, you will overwork the brass to the point where you shorten case life. Minor little slivers (hair like) will not effect accuracy enough at the 7, 11, 15, or really the 25 enough to matter.
Tests on the ransom rest put that fear to rest many years ago. At the 25yd lines it did product some minor fliers with the open class guns with their higher twist rates. (1-14, 1-15) but it was minimal.
I can't tell you how many 5 gallon buckets of 38 brass I have gone through over the years.
However, with these loads, the 700-x and the old Bullseye load, you are right on step ballisticlly with the Federal and WW Midrange Match loads. they are well under max for these powders and bullet weights, case life will be excellent. I have gotten close to 20 reloads out of a case. The nickel cases are almost always the first to split.
The key to success in PPC, trigger and sight control, use up ALL your time, If your going/have to rush, rush the reload.... the faster you reload, the more time you have on target. Slow down and breath.
And consistency... practice doesn't make perfect, perfect practice makes perfect. Again, when you settle on a bullet powder configuration, STICK WITH IT....
Good luck, good shooting.
One more note on powders... An accidental double charge of either one of these powders will get you attention, the 700-X has a much more forgiving pressure curve than Bullseye. I have experienced a double charge with both the Bullseye load (damage to the gun) and the 700-x, dang that smarted, but the gun was fine. Both instances, K-frame S&W's.
I also have had a squib load that I did not catch with the 700-x, the following shot got my attention, and it did ring the BBL slightly, (6" Mod 19) if anything the gun shot tighter after the incident... (I can only summize that the ring gave the HBWC a place to flare and maybe a tighter bite in the groves. Who knows.) However I would not recommend it.
I only mention this to note my experience/observations with the working pressures of these loads.