I have a few 155 gr laser cast LSWC as a trial but I need to finding a load for them I have WST,231,bullseye on hand, If someone could share this info before I load the few I have and I have to buy a box of them to get a load worked out.
I have loaded and fired about 500 155 gr. cast LSWC in the last year. My most accurate load was 7.4 gr. Universal Clays...not to be confused with just Clays. OAL was 1.260" with mixed cases and WW WLP large pistol primers. These were very accurate and recoiled sharply. The recoil was not uncomfortable, rather more like what I get in my .40 S&W with factory loads. The local dealer who cast the bullets told me he had cast several thousand for a local competative shooter who wanted to make major with a lighter bullet.
I shot a ton of that bullet years ago, I think my load was 7.8 grains of HP38, which power factored at 185. I seem to recall reading in Front Sight that HP38 and 231 is very similier and may be the same powder. like all load development, start light and work up loads in .2 grains intervals.
I have definitely had my share of fun with 155s, but I shoot them when I want to goof around with minor power factor. It's too difficult IMO to get to major PF with them, when it's so easy to get there with heavier bullets (and cleaner barrels).
Try using Unique or universal clays. Slower burning powder will not melt the base of the bullet and coat your bbl. Make sure you use a healthy crimp and seat a little of the lead in front of the crimp. The load works great in single stacks with the proper spring weight, but could never get it 100% in a Para high cap. Good luck, DC