Kart EZ Fit Question

coltfan · April 1, 2009, 02:46 PM

I have installed a Kart EZ Fit Barrell in my Colt series 70 45ACP. Everything seems to fit and lock up just as it should. However, it chokes on lead bullets that I have used for years in the stock Colt barrell. It looks as if the rifling edge ( leade ) from chamber mouth is closer than in the Colt barrell. I have to seat the same bullet much deeper or it runs into the rifling and the case head protrudes at least .025 past the hood. (230 gr lead RN, cases trimmed to .890). COAL needs to be about 1.213 to seat flush in the Kart. With the Colt barrell the same combo seats at 1.26. Does anyone have any insight to this? Normal, abnormal ?

Thanks.

**Unclenick** · December 12, 2010, 05:48 PM

Well, only a year and three quarters late noticing this, but in case anyone else has an issue with it:

The Kart chamber is tighter than your original and the throat is the GI hardball type. You can buy a .45 ACP throating reamer and move the throat forward and give it a more gradual taper as lead bullets often prefer.

April 1, 2009, 02:46 PM	#1
coltfan Junior Member Join Date: September 24, 2006 Location: Indiana Posts: 5	Kart EZ Fit Question I have installed a Kart EZ Fit Barrell in my Colt series 70 45ACP. Everything seems to fit and lock up just as it should. However, it chokes on lead bullets that I have used for years in the stock Colt barrell. It looks as if the rifling edge ( leade ) from chamber mouth is closer than in the Colt barrell. I have to seat the same bullet much deeper or it runs into the rifling and the case head protrudes at least .025 past the hood. (230 gr lead RN, cases trimmed to .890). COAL needs to be about 1.213 to seat flush in the Kart. With the Colt barrell the same combo seats at 1.26. Does anyone have any insight to this? Normal, abnormal ? Thanks.

December 12, 2010, 05:48 PM	#2
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,061	Well, only a year and three quarters late noticing this, but in case anyone else has an issue with it: The Kart chamber is tighter than your original and the throat is the GI hardball type. You can buy a .45 ACP throating reamer and move the throat forward and give it a more gradual taper as lead bullets often prefer. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle