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k7sparky
I have a problem with my 510-380-RF HB being too big !
I have to whack it hard enough to hurt my hand and deform the nose to get the last several bands down the muzzle.
Shoot once and the second loading bullet jams about 1.5″ above the powder charge harder than I can whack it with my palm.
Pop the breach plug, dump Pyrodex RS, and drive the bullet back out the muzzle.
Quick clean with hot soapy water and good for 1 shot and next jams again.
I am using a CVA Omega and same thing happens with a friends Omega.
Mine has never had a sabot down it.
Spent a week or 2 with Brownells wad solvent getting what looked like a corroded / rusted barrel free of all the sabot plastic from my friends Wolf and Omega. He shoots a LOT. First clue with the sabot build up was his Wolf started patterning. Bownells is the only thing I have found that cuts it and it takes time to soak. I spent quit awhile trying to find any solvent that softened sabots – all I got was really clean sabots. Sorry not even paint stripper works. Brownells or the OLD no longer available Browning Bore Cleaner that says penetrates and removes xx plastic xx fouling are the only things I have found that work.
Checked the lead hardness of one bullet and it is > 0.1″ dimple on a LEE hardness tester > plenty soft. Way off the bottom of the conversion chart.
Just for the heck of it tried the Outers Foul Out with lead solution and got only a faint haze in several spots on the rod = no leading..
Clean Barrel, drove a lubed GP down and out the breach and cleaned the lube off.
Yea I used a rejectLubing with a RCBS 512 die in a Lyman sizer and can’t see where it is moving any lead.
Back band rifling does not touch. Front band mashed almost to bottom of lube grove. SWAG < 5 mils clearance. No idea how many LEE REALs I can shoot before cleaning. Haven’t shot enough in a day to have a problem – they DO the JOB on deer – had a 4″ exit on one. My mould arrived in the mail Tuesday and had hoped to post the first picture of a deer harvested with the new GP. Talked with Al and am waiting to find out if anyone else is having similar problems or I am the Lone Ranger. BTW even with cleaning the barrel between shots it groups 1 MOA. WOW!
k7sparky-
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adamsutherland
Be a while before mine lands.
Just some thoughts and questions
What are the actual dimensions of the as cast bullets?
If the 0.512″ is just touch then it isn’t more than 2 thou over.
What alloy are you using is it sourced as pure lead, I don’t trust Lee hardness tester readings because it so difficult to use consistently, in my hands at least.
What are the actual groove and bore dimensions of your rifle?
Even at 2 thou over with soft lead once seated in the muzzle they should seat on down all right as they are now swaged to fit the barrel, there is negligible spring back in lead, I don’t get the jamming due to over size. That type of sticking is usually caused by fouling, but at only the second shot that sounds unlikely.
I have no knowledge of your rifle
I got out my best dial caliper – Mitutoyo Digimatic that is spec at .0005 to 6″ Back when I was a working stiff it had cal stickers on it and never needed more than a new sticker. Last place is either 0 or 5
The muzzle is counter bored 0.25 to 0.26 as best as I can get it.
Lands are .500 and groves are .506 to .5065 Not the easiest to measure. That echos the best I can measure on a bullet pushed through.
Called CVA customer service and their manufacturing spec is land .500 +/- .001 for the Optima V2
He didn’t remember grove tolerance but spec is .506
I am using the same lead I have used for BP for years – plumbers lead / lead sheet / roofing lead / etc for round balls / Maxi / Mini in my 54 and lately for the 50
For the measurements I tried several random as cast and they are more constant than any other multi cavity moulds I own. BTW mine is the RG4 Not sure what the chance is they came from the same cavity. Measurements are combined from both bullets
front band .5115 to .5125
1st groove .4895 to .4910
2nd band .5075 .5090
2nd groove .4865 .4880
3rd band .5060 to .5075
3rd groove .4865 to .4880
4th band .5035 to .5055
4th groove.4865 to .4885
back band .4945 to .4955OAL .840 to .842 to the side of the spruce cut and around .484 to .486 on the spruce cut
weight 381 / 382
Never worried about it much, but the diameter / weight seem right WW to dead soft lead. The OAL short is confusing. Hard to get much closer in weight.
Really don’t want to cast any with WW lead as they would be around the shop. Kind of like having more than 1 can of powder on the loading bench at any given time.
For me the hardest thing using the LEE tester is keeping the microscope across the dimple and getting a flat spot so the dimple is round instead of oval. LEE customer service says 0.094 or larger is OK for BP. I find using bright light across the sample makes reading easier.
SwedeNelson
Talked with Hornady rep: The Great Plains was designed for regular flint / cap locks. The 50 cal front band diameter spec is 0.510.
The GPs I just cast work fine in the Lyman Trade rifle I’ve had 30 or 40 – caplock. Groove .517
From what I have been able to find out there is no standard for BP calibers. No SAAMI type organization for front stuffers.
The manufacturers I called / talked with and ask for grove diameter:
CVA 506
T/C 512
Knight won’t say
Traditions rep didn’t know will get back to me – still waitingA BP competitor I talked to uses 1 to 2 mils over land size.
Another person I talked with guessed the 380 grain should be wicked in a 1:28 twist.
Looks like a 502 to 504 custom sizer for my CVA with 506 grooves would be the ticket. Never thought of doing anything with the sizer for BP other than lubing. Anyone with experience sizing for BP care to chime in?
georgepatton
Mine are dropping at .5115 (micrometer) with 30:1 and weight in around 383gr for the majority of them. I haven’t had a chance to work up loads but have pushed one down through a CVA Wolf and while it requires a short starter and some force it is only being sized down to .510 on the top band Wish these dropped at .510 but should be fine. I am looking forward to working up some loads but work is getting in the way of that for now.
Sorry to post back to this old thread but I finally got a .510 sizer and decided to try some powder coat on a few and see how they shoot. I size them to .510 before and after PC and they can now be installed and seated without excessive force or a short starter. Loading over Blackhorn 209 I sent 5 down range with acceptable minute of pig accuracy with the scope not requiring adjustment from the hotter load using a 250gr sabot and SST @ 50 yards. I will do some load testing and see how tight I can get these at a longer range.
Has anyone else loaded BP with PC only for lube?
Full.Lead.Taco
I’ve done a few just for kicks, not for hunting or serious target shooting. Some friends and I were shooting the S&W 500 bullets in our .50 cal muzzle loaders for some real thumping. We just cast them, powder coated them and shot them. Didn’t get any leading that I can remember. The PC seemed to help the bullets slide in easier.
SwedeNelson
adamsutherland
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