Inspired by Taffin

[serialsolver]

I took the Kimber Custom Crimson Carry to the range and ran some of the heavy loads in it. Accuracy is good. The Kimber is an accurate pistol anyway. The velocity was about 20 fps slower in the Kimber than the Colt I had tested earlier. I don’t know if the Kimber barrel is slower or if there is another variable. I’ll take the Kimber and Colt both the next time and shoot them side by side. The small radius firing pin stop did not have the pronounced effect on recoil that some on the 1911 forum claim. Next I’ll try a 18 pound recoil spring and a shock buff. I’m not sure if they are really needed. I’m just doing a little tweaking. I’m liking the 1911 format, specially the alloy Kimber, for the concept better than the Glocks that I stated out with.

The latest subject.

[ohnomrbillk]

Does anyone have a diffinitive powder list for the 250gr bullets? I'd like to use up some partial powder canisters while feeling out the big bullets in the ACP.

[tek4260]

Finally got around to loading a few different boolit designs. The leade on the Springfield is pretty much non existent so I had to load the Lee to a short OAL

Lee 255 RNFP- 1.135
Lyman 255 SWCGC- 1.238
Commercial 260 SWC- 1.217

All are loaded over 5.5gr of Unique. The pistol has a 20# Wolf mainspring, Wilson flat bottom FP stop, full length guide rod, and a shock buff thrown in for good measure. I hope to get a chance to test them in a day or two.

I guess this is a heck of a way to start loading for the ACP Maybe one day I will even load some regular 230 gr fodder.

[kaytod]

Finally got around to loading a few different boolit designs. The leade on the Springfield is pretty much non existent so I had to load the Lee to a short OAL

Lee 255 RNFP- 1.135
Lyman 255 SWCGC- 1.238
Commercial 260 SWC- 1.217
All are loaded over 5.5gr of Unique. The pistol has a 20# Wolf mainspring, Wilson flat bottom FP stop, full length guide rod, and a shock buff thrown in for good measure. I hope to get a chance to test them in a day or two.

I guess this is a heck of a way to start loading for the ACP Maybe one day I will even load some regular 230 gr fodder.[/quote][/i]

The Speer #12 manual has loads for their 260 grain Jacketed bullet in the 45 ACP. I used their Unique load data for use with the LEE 255 RNFP.
I too used 5.5 grains and seated the bullet where I could taper crimp on the driving band right behind the crimp groove. It gave me 750 fps, shot very accurately and functioned without hiccup in my Colt Gold cup (70 series). It was with a 16.5 pound Wolff, non progressive, recoil spring.

This load was a bit long for use in the Sig 2?? 45 auto. Their magazine length is a bit shorter.
My friend with the Sig used Uniquqe and also used Longshot with that same LEE bullet. He could easily get over 800 fps with the Longshot, however he did have to install a 20 or 22 lb spring with the Longshot and the "+P" loads as it needed a bit more resistance. Perhaps due to the more commander length slide and it's resulting reduced mass.

I stuck with the Unique as I have it onhand for many applications. I've not used the 265 LBT but I figure you could get there from here with some careful observation.

Todd

[tek4260]

Got around to shooting them today. They all shot great. I started with some factory 230's with the heavy spring and flat bottom firing pin stop to check function. It ran without a hiccup and was ejecting the brass about 3 ft. I tried all the 255s without an issue. They ejected about 4 ft. No recoil to speak of. The brass all looks great with no bulges or flattened primers. I was shocked at how well they shot on paper. All 3 loads were shooting 1-1.5" groups at 20 yards from a sandbag rest. I hope to get to run them across the Chrony here in the next few days to see exactly how fast they are running. I think I will stick with the SWC's since I don't like the seating depth required for the Lee

[tek4260]

The middle cast boolit pictured above runs 806-832fps from my Springfield over the 5.5gr Unique load. I only ran 7 across the Chrony and that is the low and high for the 7 shots.

[kaytod]

Sounds dandy!

Another thought too, I have also used the 255 SWC BB that commercial casters use. Although I don't care for BB bullets in revolvers, in the autos they seem to be fine. Being a bit relieved in the base helps them by not getting into the thicker part of some brass and creating a buldge.

Just a bit of FYI in case you run into that.
All the best
Todd

[tek4260]

Now I am thinking this might be a good application for the Mihec 270 SAA HP

[tek4260]

And now a few Mihec 270 SAA HP's to try

[kaytod]

OOH baby! Looks like they will really leave a mark.

[Markbo]

Tek, FWIW I found a pet practice load. 200gr Ranier plated FP or HP over 5.0gr Titegroup. A competition shooter buddy told me about it. Nice light practice round that actually has enough oomph for small game too. Shoots very accurately in every gun I have shot them in.

I see absolutely no reason you couldn't do the same with cast 200gr bullets. Let us know how those Mihec's shoot to, eh?

[tek4260]

Got to run a few over the chrony at lunch.

5.0gr Unique ran 797-822
5.5gr Unique ran 848-853

The 5.5gr load may be a bit much considering I am getting that velocity with a 270gr boolit. At any rate, it is right on the heels of a standard 45 Colt load.

My wife also commented on how much louder the second group, the 5.5gr load was? The brass was all in thrown about the same distance.

I hope to try to take a deer with it this weekend.