MBC 185gr SWC in 45ACP

[glockky]

Ok I hate to even ask this because i know you all get it alot on here but i am puzzled. Ok I bought a lone wolf barrel to shoot lead in my glock 21. I love shooting lead bullets and they are accurate but i cant get rid of the leading.

I bought a box of 185gr SWC .452( BHN 18 which i think is what is giving me the trouble.)I have tried a ton of loads and cant get rid of leading. I am about to give up on the lead and go back to plated. Heres what all i have tried.

5.0 gr. of titegroup
5.2 gr. of titegroup
5.2 gr of W231
5.6 gr of W231
6.0gr of W231
6.4gr of W231 which I know is suppose to be overcharged with lead.

It seems like it gets better the hotter i go but i still get heavy leading about an inch in front of the chamber, which is a realy pain to get out. Any help would be apprecited.

 

[rsrocket1]

Lead in the beginning of the barrel usually implies gas escaping around the bullet and cutting into the lead. The bullet is not expanding quick enough to seal the gases before the pressure builds up. Too hard a bullet or too low a gas pressure is probably the culprit.
5.9 is the published max for W231, but that is with a Cartridge length of 1.135 for JSWC. LSWC will have a lower max pressure. If you seat the bullets considerably shallower, the pressure goes way down to where you may get gas cutting.
I use 230g RN and 200g LSWC moly coated bullets with Unique and Red Dot and get no leading in my 1911 . I make sure the pressures are high enough to let the lead bullet seal up in the barrel because at the low 45ACP velocities, you are more concerned with gas cutting than high bullet velocities which will show lead deposits toward the tip of the barrel.

 

[john16443]

Glockky - from your description it sounds like you're using the MBC IDP#2 bullets at the 18BHN. If you're dead set on using the 185 grain lead SWC's give the Bullseye #1 12 BHN bullets a try. As rsrocket1 states, the harder bullet may not be obturating quickly enough and allowing the gases to escape. I've shot several hundred of the MBC 185gr Buttons (stubby SWC's) in a single session without leading issues using 5.0, 5.3 and 5.5 grains of W231. I've also used Titegroup with these, but below 5.0 grains.

Another option may be moving to Mastercast http://mastercastbullets.com/productpricelist.html and ordering their 200 grain SWC's in 14BHN, I should be receiving 1000 of them today.

 

[capreppy]

I've shot several thousand of MBC's 200gr LSWC (BHN 12) and several thousand of Mastercast Bullet's 200gr LSWC (BHN 14). I load either with 5.0gr of HP-38/W231. I do not have any issues with leading.

As the others have said, the round may not be obuturating and sealing off the gases.

 

[noylj]

One of the following:
The bullet diameter may be too small. have you slugged your barrel and determined the groove diameter?
The bullet is too hard, as mentioned above.
The COL is too short. Load so the shoulder of the bullet touches or almost touches the rifling/lede.
Finally, are you losing accuracy or simply don't like seeing some lead in the barrel.
Sometimes, the leading actually "equilibrates" and does not get any worse and the accuracy stays good.

 

[glockky]

what does the M stand for on mastercrafts website is that a 1000

 

[glockky]

I havent shot a large number without cleaning. But i just get tired of scrubbing for 20 minutes to get all the lead out. I am really wanting to shoot lead bullets, there is something about them i am drawn too. I think i am gonna order some softer bullets and give them a try.

 

[john16443]

what does the M stand for on mastercrafts website is that a 1000

Yes, the M means for quantity of 1000. Why Mike uses the Roman numeral instead of the more common K to denote a thousand, I don't know.

 

[glockky]

Thanks yeah that confused me.

 

[glockky]

How do you place an order with mastercast dont see a link on the website.

 

[gregj]

I'm having an identical problem with MB 200gr SWC IDP#1 BHN18 in my Kimbers. I've tried 5.0, 5.4, and 5.7gr of W231 at 1.25, and still get the same leading as OP described. The next batch I order will probably be the Bullseye #1 BHN 12.

 

[HOWARD J]

@glockky
Buy yourself a Lewis Lead Cleaner---a few passes with the cleaner & the lead is gone.
I use plated 185 & 200 gr SWC--don't need my Lewis anymore.

Good prices here: http://www.mcssl.com/store/2254068/catalog/category/5019273