Kart XACT Fit Barrels

Go down

Kart XACT Fit Barrels

Post by Jon Eulette on 9/14/2017, 11:07 am

I was questioned about the Kart XACT Fit (KXF) Barrel. So I thought I’d throw my 2 cents out there. 1911 dimensions are all over the place when it comes to barrel fitting. The KXF is designed so you fit the hood to the slide and then fit the upper lug tabs to the slide locking lugs. The bottom barrel lugs are pre-fit and has a correct barrel link for those pre-fit lugs. So the dimension from the top of the slidestop pin to the radius of the slide locking lugs is what governs the fit. SA Custom shop pistols have an extremely long dimension here. The KXF would probably drop in and be loose; in other words you couldn’t fit the upper lugs. So you would have minimal lock up/engagement with the upper lugs. If you have a 1911 with lots of vertical frame to slide play then you’re in the same ball park. A Caspian frame and slide with minimal vertical play would probably work out fairly decent because the dimension is shorter than what I’ve already described. In my opinion the upper barrel lug fit is absolutely crucial to building a BE pistol that will really be a shooter; less recoil and consistent lock up. Nowlin barrels have a pre-fit upper barrel lug. That’s why 99% of BE pistolsmiths will not use them for a build. So I’m not trying to knock the KXF, I’m only pointing out what you’re really getting. With today’s CNC quality parts I believe anyone could throw together a 1911. But the barrel fit is what governs a quality BE pistol. There probably aren’t 10 builders in the country that really understand how to fit a barrel for a bullseye pistol. I probably didn’t make many friends saying that Razz but I’ve seen a ton of custom pistols in my time and I know what’s out there.  So a true oversized match barrel (Kart, KKM, Barsto) lets the pistolsmith compensate for the differences from pistol to pistol. Experience is what you’re paying a pistolsmith for! Their experience is what they base every portion of the barrel fitting process on; no two are alike. In other words there are tradeoffs that are made during a build to get it just right for each pistol being built.


Jon
avatar
Jon Eulette

Posts : 2185
Join date : 2013-04-15
Location : Southern Kalifornia

Back to top Go down

Re: Kart XACT Fit Barrels

Post by javaduke on 9/14/2017, 12:32 pm

Wouldn't it be great if someone (like you, sir) wrote a guide on how to fit a barrel for the BE pistol Smile Kinda like "Building a BE Pistol for Dummies". Step-by-step guide, examples of what to measure, how to test fit, etc, etc, etc.
I guess I'm asking too much, am I? I believe I've memorized my Kuhnhausen book verbatim, but I'm sure it's not enough...

javaduke

Posts : 237
Join date : 2012-07-04

Back to top Go down

Re: Kart XACT Fit Barrels

Post by zanemoseley on 9/14/2017, 12:37 pm

What would be awesome is a great set of instructional DVD's or Youtube videos from someone like Jon who really knows what it takes to build a BE gun. I'd pay a decent chunk of change for a complete set of videos of the entire process from start to finish.

zanemoseley

Posts : 934
Join date : 2015-07-11

Back to top Go down

Re: Kart XACT Fit Barrels

Post by STEVE SAMELAK on 9/14/2017, 1:29 pm

Having access to the knowledge would be good....it would be better if I also had the skill and patience.  study
avatar
STEVE SAMELAK

Posts : 531
Join date : 2011-06-10

Back to top Go down

Re: Kart XACT Fit Barrels

Post by robert84010 on 9/14/2017, 2:31 pm

Don't forget the cost of good tools. Plus there are some jigs that speed up certain fitting parts, making jigs takes more than hand tools. That is why I put my stuff in a box and send it off to my guy. I've always considered sending my parts to someone I know can build as money well spent. Theoretically I could spend that building time dryfiring.

I'm not sure the Kuhnhausen is considered to be the absolute authority as it once was, at least as far as building techniques. Jon, care to comment on that.

robert84010

Posts : 557
Join date : 2011-09-21

Back to top Go down

Re: Kart XACT Fit Barrels

Post by rich.tullo on 9/14/2017, 3:28 pm

Would you say Jon that many shooters would be better off with a new bushing and some work on the legs if the buyer cannot afford a re barreling if the gun is fairly accurate, under 4 inches at 50 yards with a factory fit bushing?
avatar
rich.tullo

Posts : 1057
Join date : 2015-03-27

Back to top Go down

Re: Kart XACT Fit Barrels

Post by Jon Eulette on 9/14/2017, 3:40 pm

In the old days I have taken stock Colt .45 acp barrels and welded the hood, the bottom lugs, refit barrel and installed match bushing. They will shoot 1.5" no problem. I've shot 880's with stock welded up barrels in the past! But there are other things necessary to accommodate for stock barrel. They recoil more than newer barrels because upper lug engagement. This is how Clark Custom Guns used to build pistols! It was being done long before I got in the game.
Jon
avatar
Jon Eulette

Posts : 2185
Join date : 2013-04-15
Location : Southern Kalifornia

Back to top Go down

Re: Kart XACT Fit Barrels

Post by jglenn21 on 9/14/2017, 5:34 pm

Jim Clark used to sell Brand new Colt barrels all welded up at Camp Perry every year.. $50 ea(?)  and he sold them all. they were takeouts from his builds.. With today's Tig welders the process is much better. Heat sinks are a must.

As Jon noted they would shoot
avatar
jglenn21

Posts : 1476
Join date : 2015-04-07
Age : 70
Location : monroe , ga

Back to top Go down

Re: Kart XACT Fit Barrels

Post by teg2658 on 9/14/2017, 9:52 pm

In the 1980s Kart could not make enough barrels to keep up with demand, Jackie Best would use welded up Colt barrels if the person he was building the gun for did not want to wait for a Kart barrel. All the ones with the welded Colt barrels shot well. I know of a Clark ball gun that the bottom lug broke off of, it had a welded barrel.
Tom Ginovsky

teg2658

Posts : 198
Join date : 2014-05-22

Back to top Go down

Re: Kart XACT Fit Barrels

Post by Dr.Don on 9/15/2017, 9:27 am

My Clark 45 was purchased new in 1983.  Built on a Colt Series 70 with welded up Colt barrel.  In that period Clark often used a Bomar tuner rib to help with lockup.  I've replaced the slide mount several times, but always milled the new mount to leave the tuner in place.  It has many thousands of rounds through it (mostly cast lead), but will still hold 2" at 50yds.
avatar
Dr.Don

Posts : 518
Join date : 2012-10-31
Location : Cedar Park, TX

Back to top Go down

Re: Kart XACT Fit Barrels

Post by oldsalt444 on 9/15/2017, 12:09 pm

The Kart XACT Fit or EZ Fit barrels are great for amateurs like me who like to fiddle with their guns.  I've installed 4 or 5 of these and they will shoot sub 2" @ 50 if done right.  Like Jon says, you need a clear understanding of the fitting process and relationship between the upper lugs and lower legs. My first one didn't quite turn out right because I didn't understand this.  The instructions given with the barrel are somewhat complicated and I read, re-read and re-read them until I got a handle on it.  I like that you can get a tight lock up with careful filing. 

TIP: Buy the fitting kit from Kart. Money well spent and makes the job much easier.
avatar
oldsalt444

Posts : 129
Join date : 2011-10-26
Location : Commiefornia

Back to top Go down

This post motivated me to do my first build

Post by mhayford45 on 11/15/2018, 7:33 am

I have over the years wanted to build my own wad gun with all the parts that I like. After reading these posts, I ordered all the different parts that I like and built the gun on a Caspian frame and slide and Kart Exact fit in .45. I took my time and hand fit all parts slowly and meticulously. I completed my final testing yesterday and have a very nice gun that will hold Xring at 50 yards with 4.3g BE behind 185g Zero SSWCHPs. It is now my primary gun and cost me half as much as my AXi which is now my back up. I had so much fun doing this I may sell the AXi to fund two more builds. But I do like the AXI.

In other post I have read, Caspian quality and customer support has been less than desirable. I will say that Walt and the support staff were responsive and treated me very well. On the quality aspects, there were only two things that I thought could have been better. The cutting of the trigger channel in the frame, It took me hours of hand filing to get what I wanted in fit and the slide stop could have been better but was ok.
Attachments
Caspian Build R .jpg You don't have permission to download attachments.(91 Kb) Downloaded 8 times
Caspian 50 yard.jpg You don't have permission to download attachments.(59 Kb) Downloaded 8 times

mhayford45

Posts : 47
Join date : 2013-02-21

Back to top Go down

Re: Kart XACT Fit Barrels

Post by jglenn21 on 11/15/2018, 9:07 am

I agree on the Caspian trigger channel but the good thing is they are consistent, so after fitting multiple Greider triggers to Caspian/foster frames I can do one pretty quickly now days. Can't say I've had any issues with the slide stop.. It does pay to figure out what you like in products and use them on all your builds going forward..

Brownells just released a new Forged frame under their name so most likely it's my next project just to see how they are.

now go get the Brownells lug cutter and use the gunsmith fit barrels... if you do so I'd suggest you get the Nolan barrel holder verses the one Brownells sells with their kit. I also use a EGW lock up holder or gauge.. George sells some interesting 1911 tools which help shorten you build time.. a $$ pit for sure but it all adds to the fun.
avatar
jglenn21

Posts : 1476
Join date : 2015-04-07
Age : 70
Location : monroe , ga

Back to top Go down

Re: Kart XACT Fit Barrels

Post by jglenn21 on 11/15/2018, 9:09 am

Terrific group with swaged SWCHP, BTW 
avatar
jglenn21

Posts : 1476
Join date : 2015-04-07
Age : 70
Location : monroe , ga

Back to top Go down

Re: Kart XACT Fit Barrels

Post by zanemoseley on 11/15/2018, 9:10 am

That makes sense why Brownells hasn't been carrying Caspian frames. They're listed on their web site but always out of stock. I even checked with Caspian last time I needed a frame and Brownells didn't have any frames on order. So they're basically permanently out of stock.

zanemoseley

Posts : 934
Join date : 2015-07-11

Back to top Go down

Re: Kart XACT Fit Barrels

Post by Mike38 on 11/16/2018, 11:57 am

I installed a Kart barrel (back at the time called E-Z Fit) in a Sistema Colt M1911. Prior to the install the pistol shot 8 inch groups at 25 yards from a sand bag rest. After the install of the barrel and a new slide, the 25 yard groups measured around 3 inches. While the E-Z Fit barrels are great for the average home pistolsmith, they are not Bullseye accurate, but probably could be if done by an expert at it. I do wonder what the life expectancy is on one these? Probably shorter than a smith fit barrel? Mine still shoots as good as the day installed, but it only has around 5k rounds through it.
avatar
Mike38

Posts : 266
Join date : 2016-09-15
Location : Illinois

Back to top Go down

Re: Kart XACT Fit Barrels

Post by Al on 11/16/2018, 2:40 pm

Mike38 wrote:I installed a Kart barrel (back at the time called E-Z Fit) in a Sistema Colt M1911. Prior to the install the pistol shot 8 inch groups at 25 yards from a sand bag rest. After the install of the barrel and a new slide, the 25 yard groups measured around 3 inches. While the E-Z Fit barrels are great for the average home pistolsmith, they are not Bullseye accurate, but probably could be if done by an expert at it. I do wonder what the life expectancy is on one these? Probably shorter than a smith fit barrel? Mine still shoots as good as the day installed, but it only has around 5k rounds through it
All my BE 1911's have the Kart EZ or Exact fit barrels.
First one was in 1999, wasn't all that great, but it beat the stock barrel Springfield had installed. It lasted for 32,000 before I changed it out for a second one & had the slide & frame refit at the same time. That one has lasted over 52,000 rounds & still holds 2" or less with 4.6 of BE & Zero 185JHP. Granted the last bbl has seen over 50K of soft lead and <2k of jacketed, but it gives an idea of Kart's accurate barrel life.

The other 2 with Karts, are my hardball gun & a newer Caspian I had built. I expect to see around the same lifespan with those 2.
Al

Al

Posts : 364
Join date : 2011-06-10
Age : 63
Location : Bismarck, ND

Back to top Go down

Re: Kart XACT Fit Barrels

Post by Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum