thompsoncustom Posted April 8, 2015 Share Posted April 8, 2015 Well reamed my 9mm (CZ Shadow) throat a little longer the other day and everything loads great now. Only problem is that I shot 99% lead bullets and now my barrel is leading with Powder coated bullets. For those that have reamed a barrel and shoot lead was there more to the process to get it to run good with lead again. I tried smoothing the leade out a little with some 2k grit polish but it's still leading so I was looking for some advice. Thanks Dan Link to comment Share on other sites More sharing options...
Sarge Posted April 8, 2015 Share Posted April 8, 2015 Load longer? Perhaps cutting gas is getting around the bullet before it makes it firmly into the bore. Link to comment Share on other sites More sharing options...
thompsoncustom Posted April 8, 2015 Author Share Posted April 8, 2015 (edited) Jamming into the rifling right now can still extract a round with a little force but any longer and bullets will be getting stuck. Edited April 8, 2015 by thompsoncustom Link to comment Share on other sites More sharing options...
CZ85Combat Posted April 8, 2015 Share Posted April 8, 2015 Never jam into the rifling! Did some one say KABOOM You may just have left a burr. try shooting some fmj ammo & then polish the throat. What OAL are you loading? Have you slugged tour barrel? I have seen some trying to shoot .355 9mm bullets in a .357 barrel. Link to comment Share on other sites More sharing options...
thompsoncustom Posted April 8, 2015 Author Share Posted April 8, 2015 (edited) Good points, Funny thing I just sent you a PM Tired that the other day shot 100 FMJ bullets after I polished it with 2k grit buffing compound. Still got some leading today. Barrel slugs at .3555 throat reamer is .357 bullets are sized to .3565 As far as kaboom goes IDK about that, a lot of precision rifle shooters jam into the rifling without issue. I have Quickload and a chronograph to gauge pressure as best I can. Been shooting lead for a long time but this is the first time i've reamed a barrel. Edited April 8, 2015 by thompsoncustom Link to comment Share on other sites More sharing options...
CZ85Combat Posted April 8, 2015 Share Posted April 8, 2015 In rifles its ok to touch the rifling, they use SLOOOOW burning powder. Pistols use fast burning powder & you can get a pressure spike. you need .010-.015 of a jump for the bullet to get moving without risking a pressure spike. Link to comment Share on other sites More sharing options...
thompsoncustom Posted April 8, 2015 Author Share Posted April 8, 2015 (edited) Thinking about buying a endoscope and giving my gun an exam . I see they have x50 magnification endoscope that plug into the PC for about 40-50 bucks which would make for a cheap bore scope. About the only thing I can think of is the reamer must have left some course grooves cutting which is messing with the powder coat. I have been only shooting my heavy 160gr Powdercoated bullets since I reamed the barrel because they are the toughest but I'll have to try some of the 124gr Hi tek coated bullets to see if that makes a difference. Edited April 8, 2015 by thompsoncustom Link to comment Share on other sites More sharing options...
Sarge Posted April 8, 2015 Share Posted April 8, 2015 Good points, Funny thing I just sent you a PM Tired that the other day shot 100 FMJ bullets after I polished it with 2k grit buffing compound. Still got some leading today. Barrel slugs at .3555 throat reamer is .357 bullets are sized to .3565 As far as kaboom goes IDK about that, a lot of precision rifle shooters jam into the rifling without issue. I have Quickload and a chronograph to gauge pressure as best I can. Been shooting lead for a long time but this is the first time i've reamed a barrel. Bullet setback will blow up a pistol with ease. Don't confuse one type of reloading with another. As a matter of fact many guns are more accurate the shorter the round so getting right to the rifling is not so critical in this game. Link to comment Share on other sites More sharing options...
thompsoncustom Posted April 9, 2015 Author Share Posted April 9, 2015 I started loading into the rifling when I was shooting 170gr SWC bullets in my cz 75b, I never found any difference in the velocity from rounds jammed into the rifling versus bullets seated right before it. Does that mean pressure isn't spiking? No but I guess we really don't know what the pressure is really doing it's just a educated guess. The reason I reamed this barrel was to step away from having to jam into the rifling with such heavy bullets. After reaming I can load my lee 158gr bullets to 1.123 without hitting the rifling and my lee 124gr RN TL bullets to 1.185. Haven't tired to break out the 170's Some 170gr bullets in front of 2.8gr of aa#2 makes for some really soft shooting minor ammo. Link to comment Share on other sites More sharing options...
wheelie Posted April 10, 2015 Share Posted April 10, 2015 (edited) snipped....Barrel slugs at .3555 throat reamer is .357 bullets are sized to .3565snipped more... When you cut the new throat longer you probably also cut it larger in diameter (in the new straight cylinder section of the throat that leads to the tapered section). A .3570" reamer will not cut a .3570" hole. As a fix, you might want to try sizing the bullets to .357 or larger. Can you make a proper chamber cast to really see what your new throat looks like and what it actually measures? Edited April 10, 2015 by wheelie Link to comment Share on other sites More sharing options...
thompsoncustom Posted April 12, 2015 Author Share Posted April 12, 2015 Not sure if I have any pure lead around or not to do a pound cast of the throat. Ran 100 124gr hi tek coated bullets yesterday. Leading with these seemed a little different. Instead of random splotches throughout the bore it had most of the leading at the muzzle pointing towards coating failure. Tho even at the end the accuracy was still spot on some I might just try to put more rounds through the pipe to smooth things out. Link to comment Share on other sites More sharing options...
CZ85Combat Posted April 13, 2015 Share Posted April 13, 2015 What is your crimp with the coated bullets ? With the coated bullets you use next to no crimp. Link to comment Share on other sites More sharing options...
thompsoncustom Posted April 13, 2015 Author Share Posted April 13, 2015 I use next to no crimp on all my cast bullets just enough to push the bell beck for the most part. Also pulled bullets show no sign of shaving or under sizing and bullets fired at speeds just enough to clear the barrel show the coating to be intact. Link to comment Share on other sites More sharing options...
jcc7x7 Posted April 14, 2015 Share Posted April 14, 2015 Shoot a couple of hundred more jacketed bullets through the bbl When I cut a chamber that's what I do Seems like it deburrs the end of the cut and start of rifling. I shoot mostly coated with a .002 -.004 crimp and load as long as the mag will let me. Link to comment Share on other sites More sharing options...
thompsoncustom Posted April 14, 2015 Author Share Posted April 14, 2015 Ya I need to go buy some FMJ's I have maybe 100 more on hand and only 200 plated bullets but I will feed all of that and check again. Link to comment Share on other sites More sharing options...
usmc90 Posted April 21, 2015 Share Posted April 21, 2015 (edited) I had my shadow reamed to more easily accept 147 coated FP's (SnS) ..I dont get the leading and im loading to 1.139" Edited April 21, 2015 by usmc90 Link to comment Share on other sites More sharing options...
thompsoncustom Posted April 22, 2015 Author Share Posted April 22, 2015 Got another question for some of you. For those that used a manson reamer what diameter of bullet are you running now? and did you have to change it after you reamed the barrel? Link to comment Share on other sites More sharing options...
bowenbuilt Posted April 23, 2015 Share Posted April 23, 2015 I have 5 9mm that I have used a Mason reamer on to extend the lead and I didn't change anything but the OAL and no leading problems. You may have to fire lap your barrel to get the rough spot out. Buy a fire lapping kit and fire about 10 to 20 rounds and that should take care of any rough spots if that is causing the problem. Link to comment Share on other sites More sharing options...
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