I have 4 1911 45acp pistols in my stable. 1-Springfield, 1-RIA, and 2- Sig-Sauer. They are all throated for SWC style boolits. Two of them are match grade weapons, although the other 2 shoot equally well for me for the most part.
Today I did some serious testing on feeding and accuracy(within my limits) of these two boolits. I have been working up to this point for several weeks in an attempt to find a single boolit in SWC style that would function well and shoot accurately in all my 45acp 1911 pistols.
Both were cast from the same alloy(range scrap), sized and lubed with 50-50 in my 4500 sizer, and loaded in mixed brass with 4.0 grains of Bullseye.
I didn't use a rest for any of this as I figured I should test them as I would be using them.
I was expecting to have some possible feeding issues. None materialized. All four pistols fed and fired both boolits without fail.
I didn't really know what to expect as far as which boolit might prove more accurate. Both have a long earned reputation for accuracy in 45acp.
During the course of shooting, I did find a winner but only by a small margin.
In three of the guns, the accuracy was as close to identical as makes no difference. In the last one the Lyman 452460 was a clear winner. The groups were about 1/2 inch smaller at 10 yards for me.
I tested by shooting two 8 round magazines into a target at 10 yards, then pulling the target and measuring. Then switching to the other boolit and repeating the process with each pistol.
I went through all 4 pistols in this manner twice.
That is a lot of brass on the floor and a bunch of targets to compare. It finally boiled down to what worked better in one of the match guns.
Three of the pistols shot nice round groups with no stringing(other than my called mistakes) with both boolits.
The last gun is an RIA put together by a "local" gunsmith(about 55 miles away) who is very good at what he does. He took the time to fit the slide, barrel, and bushing as well as the trigger for his own personal use then decided to sell it after he finished it. It has a Kart national match barrel in it.
In this pistol, the 452460 shot noticeably better than the H&G clone.
For this reason I am going to go with the 452460. I may keep the other mold around for the occasional experiment but the majority of my loads will be the 452460.
I am not a great shot, so I won't post targets. Suffice it to say, I was impressed by what I got in the way of results from both of these boolits.
Prior to the last few weeks, the majority of my shooting had been with 230 grain boolits in various configurations. Most worked pretty well. One stood out above the others and wouldn't you know it was the Lyman 452374. The old classic and still one of the best.