Graybeard
Knowing about fatigue from overflexing I don't like to flare my case mouths much. Just enough to allow the base to start into it. Now that I'm using Acme beveled base bullets I don't need as much flare.
I'm wondering about your method for setting crimp. 1/2 turn is about .035 which, to me, is a lot when crimping. I typically go less than 1/8 turn from when I feel the die contact the case mouth. That seems to retain the bullet satisfactorily, for me.

Overall, I like how the gun shoots. Like all 1911s, accuracy is good (better than _I_ can shoot) and function is reliable for what I'm doing. Pin shoot tomorrow morning and if I can load some 10s today, I'll run it and report. The only thing I'll change will be to add a magwell. I've already added an enlarged mag button and extended slide lock. I do this to all my 1911s.

Quote from: Sneed on June 12 2020 02:14:56 PM MDT
In my experience taper crimping is much easier to setup than roll crimping and works as well.

I'm using Dillon dies and I don't know if they are taper or rolled crimps. I can see the shape of the crimp, whatever it is.

Graybeard, Thanks for the well-reasoned explanation. I'd not thought of it that way and it gives me lots to think about. Your suggestion of the 40 barrel goes a long way with me.
I do a heavy crimp on my 9 and 45s so I'm wondering if maybe I'm crimping too hard on them. I set my dies this way since I'd had several failures to lock in battery and it was EXTREMELY hard to pull the slide back to extract the shell, as if the bullet was engaging the rifling, even with proper COAL. I seated the bullets a bit deeper and set the crimp die several thou further down. Solved that problem. I can now see the crimp roll on the mouth.
I'm also just setting up my 650 to load both 40 and 10 so I'm wondering how much crimp to do there. I'd guess I should remove the barrels from my 1911s and crimp an empty case and see how they seat in the chamber. What are your thoughts on that ?

I'll check around for the loads Bimmer mentioned. I use a #49 Lyman load manual. I use either Bullseye or Universal.

Quote from: Graybeard on June 11 2020 05:16:44 AM MDT
[SNIP] get a .40 barrel if you plan on shooting them through the STI regularly. You're putting undue stress on the extractor [SNIP]

[SNIP] Montana Gold 180gr hollow points @1200fps. I wish I had known about the RMR 180fmj bullets[SNIP]

Congrats on your find!

Thanks for the warm welcome here.
While I appreciate your caution about shooting the 40 in the 10mm barrel, I don't understand how this is hard on the extractor. As I understand it, the case comes up from the mag and slides into/under the extractor hook, not springing it in any way.
I would be open to a bonafide explanation of the mechanics of this 'problem'.
I'd forgotten the model number of the Wilson mag. Yes, it's a 47 I use.

I wasn't aware of the RMRs and will look into them. I do like a wide meplat for pins. I'd been using a Vance 255 grain Keith SWC as my 460 load and like it. I'd also like to find a Keith SWC in 9mm but nobody makes one, only round nose which leaves a ragged hole. I happen to like a clean hole in the paper.

I've used the search function here but haven't been able to find how to set notifications, like other boards provide, for email notification of a post to a thread I've subscribed to. Is that option available on this board ?

I had a computer intrusion recently which wiped out all of my data. YEARS of gun info. That's hard to swallow.

I finally got around to doing a Google search for STI Heavy 10 and here I am.
All I ever shoot/carry is a 1911 so I decided to add a 10 mm 1911 to my "bureau of alcohol, tobacco and firearms". (No I don't smoke. At least not anymore)

The man I bought mine from said he'd only shot about 100 in it and it looks it.
He also said that there were only 20 of the Heavy 10 1911's made so ron556's comment of 30 built kind of rings true.

I was looking for a 10 mm to shoot bowling pins with and found this one on gun broker about a year ago. 10 mm cases are not what you find every day at the range and since it is considered to be a 40 caliber magnum I decided to play around with 40s in it before I got set up to load tens.

I've not shot any tens in it yet but since the extractor holds the case back against the breech face in a 1911 I decided to give that a try. It works.
I've shot 380s in my 9 mm 1911, not that they work the slide but at least I can burn whatever 380s I happen to have and punch holes in paper. I also discovered that the Wilson 45 caliber magazine feeds the 40s in the Heavy perfectly.

I've been knocking bowling pins off of the 3 foot deep table with my 45 and found that the 460 Rowland load works very well in my Dan Wesson K03, 45 ACP. Pushing a 255 grain Keith SWC at 1000 is quite a handful which is why I decided to try the 10.

I load my 40s with either 170 or 200 grain bullets at 1000 FPS and they seem to work fairly well on the pins at 25 feet. I can push the pin off the back of the 3 foot table very well.

No matter what I'm shooting, I anticipate shooting as many 50 during each course of the bowling pin tables. Five pins, two 8 round mags, for four tables, first course of stock service pistol and the same for the Open pistol. Yes it's punishing but it's good practice and whether I'm shooting the heavy 10 or the 460 I deal with it.

All of my 1911's have a 3-3/4 pound trigger, all smooth and of course crisp. The heavy ten has a 2-1/2 pound trigger and when I'm shooting pins, occasionally I will light off a shot when I'm not ready. I reset during the recoil excursion. I will either have to increase the trigger weight on the 10 or decrease the trigger on my other 1911s. As mentioned, my KO3 is also my EDC which also handles my bowling pin loads.

What I don't understand is why there's such a heavy recoil spring in the Heavy and also in my STI 2011/45 ACP.  Seems like it's 25 pounds while my K03 has an 18 pound spring.

I'd ordered a mag from BROWNELLS and explained the Heavy 10 to the technician there (He'd never heard of the Heavy 10) and for some reason he sent me a double stack mag which obviously does not fit. That was when I tried the Wilson 45 caliber mags which I use in my K03 and they work in the Heavy. Not right but still, if it's a stupid idea but it works then it isn't stupid. Put that in your pipe and smoke it...

I don't know whether I prefer the short high recoil impulse of the 40/10 or the long heavy pendulous shove of the 460 Rowland. When I'm tired, the 460 will dislodge the gun from my left hand and I have to re-grip.