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Post by newrugersafan on Apr 10, 2019 17:59:41 GMT -5
I just pulled out my 480 Bisley and pushed some bullets through the throats from the chamber side.
Bullets were powder coated and sized in NOE push through sizer with a .476 bushing. Bullets pushed through all throats with finger pressure. I checked size after pushing through and it measured .476. I also have a bushing for .477 and a bullet sized to .477 will not push through with finger pressure.
I did not get any shaving of the powder coat when doing this. I'm going to push a .477 bullet through from the chamber to see if it scrapes off powder cost and lead.
I'll get back with this information.
Mike
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Post by newrugersafan on Apr 10, 2019 18:28:47 GMT -5
Here are the results. The crimp area is intact, it shows a little scrape on one side but it may have started off center. The rest of the bullet is intact until the base hit and you can see the resulting ring of lead. I'm sure the base expanded as I drove the bullet through and sheared the lead off as it hit the throat. The powder coat is in good shape. It kind of created a powder coat fin at the base.
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Post by boolitdesigner on Apr 10, 2019 19:45:11 GMT -5
I've heard this discussed before. The previous talk was about the crimp area sloughing off, but yours shows it is the base band doing so. Please, try some more with a proper size flat faced wood dowel as the pusher and see if it repeats itself!
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Post by firedude on Apr 10, 2019 21:59:59 GMT -5
Yup, this came up as a possible source of the lead ring, back when Tank Hoover was posting here on testing loads in the then new BSBH. The idea was that if seated shallow the ring would shear as the bullet left the case. If seating long, it could get sheared, knocked loose by set-back. I'd like to hear from people that have SRH 480's and use this bullet, a seen issue for you ? Other bullets leaving lead rings in either firearm ? I have a SBH and SRH Alaskan in 480. The SBH had the lead ring problem when new with the two lead bullets I tried. Missouri and CP. The SRH never had a problem with lead shaving. It did have a very bad "brass sticking" issue though (read wooden dowel and hammer to extract one at a time). I did a polish on both cylinders and that helped quite a bit. Shooting a couple hundred rounds of jacketed bullets seems to have helped even more with the lead rings on the SBH. Hardly see it if at all now. SBH has close to 500 rounds through it. I would not open up my throats on either gun. They are already quite large. I do not have pin gauges but a .476 falls through both guns. I would guess just under or at .478 average on both.
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ebg3
.30 Stingray
Posts: 157
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Post by ebg3 on Apr 11, 2019 5:19:30 GMT -5
This is an interesting topic. I've shot three different cast bullets in my sbh 480. The first I tried was the Lee 400 gr bullet, powder coated. Leading in barrel, cylinder and on case mouths was terrible. These bullets were cast with "med-lead" powder coated, then sized to .476 on a lubrisizer. I tried H110 and 2400 powders with no real change to the leading issue. I bought some 345gr swc/gc bullets from MBW that are hardened to 22 bhn and have shot them from mild to full power with H110 and 2400 with zero leading. This bullet does not shoot very accurately in my gun for some reason. My favorite bullet is the RCBS 400gr SWC. I cast it with "med-lead", size to .476, and lube with home brewed 50/50 lithi-bee lube. I have shot this bullet air cooled and water dropped. I get no leading with this bullet and 18.5gr 2400, I have not tried it with H110. This is a soft bullet (I guess around 12 BHN) when air cooled but it carries a lot of grease and has a big single crimp groove. Very nice combo in my sbh. I have not tried to powder coat the RCBS bullet, it's simple enough to lubri-size after casting. I liked the Lee bullet when casting but can't do anything with it in my sbh. I even tried water dropping and lubri-sizing with the same leading results.
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