hummerbk Posted December 1, 2015 Share Posted December 1, 2015 I've been loading 175gr SWC with 3.5gr Bullseye and shooting them thru my Glock 35 and they have been working flawlessly. Probably shot 1000 rounds or so. I ordered some PC coated bullets from the same manufacturer and loaded them exactly the same as the uncoated bullets. The recoil is way less and I'm getting multiple jams per magazine. It stops with the shell angled up into the chamber. It seems as if it needs more powder to function correctly but I'm not sure. In my frustration at the range I did not notice if the slide was locking back with the PC bullets. Anyone have an idea what could cause this? Link to comment Share on other sites More sharing options...
hummerbk Posted December 1, 2015 Author Share Posted December 1, 2015 66 views and nobody had a clue. It turns out that PC bulles are slicker and don't stay in the case long enough for pressure to build up. The fix was bumping the powder charge to 4gr. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted December 1, 2015 Share Posted December 1, 2015 66 views and nobody had a clue. Not fair. Give us another question - we'll get this one right. :roflol: Link to comment Share on other sites More sharing options...
ChuckS Posted December 1, 2015 Share Posted December 1, 2015 Honestly, I never considered bullets to be Politically Correct... Link to comment Share on other sites More sharing options...
Toolguy Posted December 1, 2015 Share Posted December 1, 2015 Yeah, me neither. But then I never worry about being Politically Correct anyway. Link to comment Share on other sites More sharing options...
TDA Posted December 2, 2015 Share Posted December 2, 2015 I thought you were referring to a brand of bullets, like MG's. I couldn't figure out who PC was. Link to comment Share on other sites More sharing options...
noylj Posted December 2, 2015 Share Posted December 2, 2015 If it was the exact same mold/bullet, just powder coated, then I have no idea. I have only tried PC (powder-coated) bullets in 9mm/.38 and .45. If feeding is a problem that usually means COL needs adjusting or magazine is bad. If load just barely cycles gun, then you many need to up the charge by 0.2gn or so. Link to comment Share on other sites More sharing options...
hummerbk Posted December 3, 2015 Author Share Posted December 3, 2015 (edited) The bullets were polymer coated. Everything was the same including COL. Bumping the powder charge fixed all the problems so the slide velocity must have been the problem.. Edited December 3, 2015 by hummerbk Link to comment Share on other sites More sharing options...
bowenbuilt Posted December 3, 2015 Share Posted December 3, 2015 (Quote) hummerbk Posted 01 December 2015 - 04:41 PM 66 views and nobody had a clue. It turns out that PC bulles are slicker and don't stay in the case long enough for pressure to build up. The fix was bumping the powder charge to 4gr. Actually PC bullets offer more resistance than plain cast lead and are harder to drive. The extent of this depends on the type (ingredients) of the powder coating. Most PC bullets I have compared were 30 to 70 FPS slower than plain lead with the same powder charge. This is why you had less recoil and a lower velocity and had to bump the powder charge to get back to where you started with the plain cast lead bullets. Link to comment Share on other sites More sharing options...
Nathanb Posted December 4, 2015 Share Posted December 4, 2015 http://www.kingshooters.com/pc-4010-175-swc-p-49646.html PC bullets? Link to comment Share on other sites More sharing options...
rootie3 Posted December 4, 2015 Share Posted December 4, 2015 in rifles i believe the coated billets lower the pressure buildup. this would create a problem for semi autos.... no? Link to comment Share on other sites More sharing options...
Nathanb Posted December 4, 2015 Share Posted December 4, 2015 Going from coated bullets from blue bullets to plated in extremes I noticed about 10 to 15 fps more on the coated. I don't shoot bare lead so I can't say what that is Link to comment Share on other sites More sharing options...
igolfat8 Posted December 4, 2015 Share Posted December 4, 2015 Most PC bullets I have compared were 30 to 70 FPS slower than plain lead with the same powder charge. Hmmmm, I've had just the opposite results. I have been charting velocities on .40 PC bullets and my velocities have been 30-125 FPS faster with PC boolits than the exact same load in lead. Link to comment Share on other sites More sharing options...
hummerbk Posted December 4, 2015 Author Share Posted December 4, 2015 Most PC bullets I have compared were 30 to 70 FPS slower than plain lead with the same powder charge. Hmmmm, I've had just the opposite results. I have been charting velocities on .40 PC bullets and my velocities have been 30-125 FPS faster with PC boolits than the exact same load in lead. Thats very interesting. I don't own a chrony but the recoil difference between lead and PC bullets was extreme. Similar to a 38 special compared to a .357, although not quite as much. Bumping the powder up fixed the problems so I have to assume it was velocity related. Link to comment Share on other sites More sharing options...
bowenbuilt Posted December 5, 2015 Share Posted December 5, 2015 (edited) I have never seen a powder coated bullet that was faster than cast lead with the same style, OAL and powder charge. Hy-Tech or poly could be another story. Edited December 5, 2015 by bowenbuilt Link to comment Share on other sites More sharing options...
Steve RA Posted December 5, 2015 Share Posted December 5, 2015 A lot would depend on whether or not the bullets were the same diameter. It seems that the bullet companies are all over the map with differing diameters (all within 3 or 4 thousandths, of course) in the same caliber. Link to comment Share on other sites More sharing options...
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