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I have asked Jim Keeney a few questions and now I'm coming up with more and more questions so I thought I'd throw this out to everyone. Last year I was on the list to have a 10mm done with John Harrison. My fiance at the time had just become pregnant and was involved in a car accident that has left her with back problems with not much being able to be done about because of the pregnancy. There was question as to whether or not she could continue working but she ended up getting a job at a bank and has beared the pain up until next week or so. The baby is due at the end of June. That said at the time I had cancelled my project just o be on the safe side. I've been saving all my extra extra pennies to hopefully start the project again but now I have alot of questions that probably should have been asked a long time ago.

The given: The frame and slide will be from Rock River Arms, 5" bushing style setup.

Non Ramped vs Ramped barrel. Now, I understand with the 10mm similar COAL as the .45, there isn't a need for a ramped barrel per se. But does the feed ramp on the frame have to be modified more to suit the 10mm or is the frame thats cut there in the beginning good enough? I also understand with the non ramped you are giving up some case support and full house loads are not really recommended in this situation? Any guide lines on what the "theoritcal" limit would be? 200grn at 1000 FPS or so lets say for example?

Ramped barrels have the advantage of having full case support. But I've read that the angle for the feed ramp is so extreme that you usually have more nose dive/jams than with a standard ramp? And if one is to do the ramp, the clark/para is the ramp style to go with as it in theory is stronger correct?

Onto actual barrels. I'm interested in the Kart barrel (ramped or non ramped will be decided by info I get). But I also read some about schuemann ultimatch AET barrels...does anyone know if he chambers one for 10mm specifically? I sent an email off but no response....dont really want to call quite yet as I'm not exactly ready to order the barrel.

One last one.....while browsing through the kings catalog I noticed they had barrels. I think I've read that storm lake is the manufacturer. What was somewhat interesting was the extractor cut does not extend into the chamber providing full case support....maybe a good idea for full power loads? Anyone ever work with the Kings barrels?

Well I think that should cover just about all the ramblings I have for a while. Any info would be appreciated![/b]

My main shooting 10 is one my son built for me. 5" Caspian with a Kart W/N ramped NM bushing barrel. Havent owned a Shuemann but havent seen anything outshoot a Kart and they run 1/2 the price. It doesnt nose dive any worse than my Deltas with non ramped factory barrels. They all seem bad about it on the first round if not ran home with some authority.

Below is a picture of a 6" 10mm my son put together for my partner. Caspian SS with 6" Kart NM W/N ramp. The 25 and 50 yard groups attest to the Karts accuracy.

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Gary Eastridge
http://www.randgfirearms.com

Gary: Thanks for the reply. I'm not doubting Karts accuracy...it was some of the added benefits of the shuemann...the clark/para/lissner modfied ramp had some appeal to me as they may feed better and according to wil has not heard of one breaking yet.

That said I am leaning towards the Kart with clark/para ramp but I wanted to get some other opinions before I commited myself to that particular setup. You are right though...hard to beat a Kart when you factor in the price and the accuracy you recieve from one!

I just got my Delta back from the Yobo guys, and they used the Schumann. I have no complaints with it.

Corey, Schuemann doesn't make a 10 MM barrel per se, as he doesn't like the caliber, but will supply a generic .400 caliber barrel and you ream to suit. I don't know about availability, but it was problematic for awhile. Personally, I don't see any advantage to a ramped barrel in the 10MM. I've done a number of them in 5", Commander and even one in an Officers length (not again tho'), and never had a problem. Colt never used them in the original Deltas, and that was when the only ammo available was the Norma 200 Gr. load, which was not only hot but somewhat erratic as to pressure variations. I never heard of lots of problems with this setup, so unless one wants to really hot-rod the cartridge, I don't think the ramped barrel is necessary.

The feed ramp on the 10MM frames is different than the 45 ACP, so if your frame is already cut to that rampstyle, you may want to go to the ramped barrel. I believe the Clark/Para style ramp is the better of the two, owing to the design of the link lug reinforcement style, which I think is the stronger of the two designs. Also, the difference in the Lissner style of this design as I understand it was his addition of a radius at the junction of the feedramp/linklug area to avoid shearing here. I think almost all the barrel mfrs. have gone to this modification on their barrels.

I don't know about now, but Kings used to make their own barrels. I have a well used Kings barrel in a 45ACP 5" gun I built years ago, and it is a very good barrel. Storm Lake also makes a good barrel, and a number of 'smiths and mfrs/ have sub-contracted to them for barrels with their name on them. Best,

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Don Williams
http://www.theactionworks.com
http://www.ltwguns.com

and there you have it from one of the best.

10mm Officers ACP. Bet that was a flame thrower!

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Gary Eastridge
http://www.randgfirearms.com

Don,

Thanks for the info. My worries were with the RRA frame being setup for a .45 ACP that the feed ramp wouldn't exactly be correct. Is caspian the only one selling frames setup for the .40/10mm from the get go?

Ah well....I thought I had read that storm was making the barrel for kings but no matter. I just thought the design with the extractor cut not extending into the chamber was a interesting thought. They are pretty reasonable in price thats for sure. Need to do some more pondering....at least I'll have the barel setup/choice narrowed down a bit.

Now I have a "better" idea at what to do anyways. Thanks again to everyones!

You can also use a .38 Super feedramp frame and modify it to a 10mm ramp.

I should have stated....the frame and slide are coming from Rock River Arms. Our gunclub has an FFL on hand with them when I bought my ar-15 from them a while ago, so we get the dealer discount. They seem to be really nice frames/slides so it seems like a good starting place for the 10mm build. Only problem is the potential wait on the 10mm slide, I hear they only do a few runs throughout the year.

At this point it looks like I will be going with a ramped barrel. Just need to do a little more homework research before I decide where it's coming from. Don has also been of great help with some of my other questions. Little by little I'm getting all the pieces bought up. Hopefully next week I'll put the order in for the frame and slide and then the wait will begin.

Once again, thanks for the information people!!

I would suggest a Kart barrel. IMO, the strongest 1911 barrel on the market and in my experiences, one of the most accurate.

Corey:

I'm sorry to resurrect an older thread but when I saw you were waiting on a RRA 10mm slide and frame I had to drop a note.

I'm waiting on a RRA frame and slide too- I gather they will be doing their 10mm slide run soon so we both might be in luck before summer is out.

The only time I've ever had a 10mm show pressure signs on cases was with a Glock 20. Years ago while I waited for an SV hi-cap 1911 10mm to be built for IPSC Limited I used a Glock 20 for a season and with my hot pin loads the base of the case would bulge. The gun ran fine with them but I couldn't seat the die deep enough to completely remove the bulge and had to toss those cases as they would hang up the single stack 1911 10mm I was also using at the time.

The above mentioned Strayer-Voight and my current carry gun, a Caspian 10mm, both use Kart barrels. I sold the SV when I got out of IPSC (became a dad!) but it had obscene amounts of ammo through it and the current gun does too. I love Kart barrels and do not think you'll have a problem, nor do you need a ramped barrel. There is obviously nothing wrong with that route as stated above but I have been a 10mm fanatic since my first Delta Elite in 1992 and just haven't had a single problem with conventional setups.

Please share with us the status of your project as things get rolling.

Brent

My Custom 10mm build has a Bar-Sto barrel. 5 shots 1 ragged hole at 25 yards. I have no complaints