I started reloading the 45 ACP in 1974. My first powder of choice was Red Dot. After several years I finally shot a serious, aimed group with it and was disappointed in the accuracy. Switched to Unique and the groups were much better. Several years after the switch I got a chronograph. The variation with my Unique loads, due to the poor performance of Unique's flakes in a powder measure, made me switch to 231 which I used for the next 15 or so years. Quit loading about 6 years ago (health problems) but got back into it last year.
For years I shot 6g of 231 under a H&G #68, 200g SWC which gave right around 900 fps and was more accurate than I was. I don't have an exact number but based on the number of WLP primers I bought (by the sleeve) I fired several hundred thousand of those. When I got back to it I decided to go with Berry's plated bullets, both a 200g Round Shoulder (RS) and their 230g Round Nose (RN).
The 200g plated bullet loaded over the same old charge of 6g of 231 is 10 or 15 fps slower than the lead 200g was. I can live with that. I thought with the 230g I would have to drop down to get my objective of Ball duplicate (830 fps) performance. I started with 5.4g of 231 and didn't even break 800 fps. Eventually got an average of 834 fps out of one 5" Government Model and 832 fps out of another GM, but that was with 6g of 231, the same load I was using for the 200g plated bullets.
I've mentioned this load on a couple other internet boards and I generally get yelled at for being over max. Well, the Speer #13 manual I have says 6.2g of 231 is max with a 230 FMJ. I suspect/believe the plated bullets will generate less pressure than a FMJ so I believe this load is OK. It shows no signs of excess pressure at all and in fact shoots, ejects and feels exactly like some mil surplus Ball I compared it to.
Not recommending anyone else use this load, just relating my recent experiences. Also, I'm convinced the majority of the loads Ive seen listed earlier in this thread for 230g bullets are under performing, some significantly.
YMMV,
Dave