43 Spanish Tumbling - Shooters Forum
» Advanced

Go Back   Shooters Forum > Blackpowder > Blackpowder Cartridge Shooting and Loading
Register FAQ Members List Donate Calendar Search Today's Posts Mark Forums Read



Reply
 
LinkBack Thread Tools Rate Thread Display Modes
  #1  
Old 05-06-2017, 04:50 PM
Registered User
 
Join Date: Apr 2017
Location: central FL
Posts: 4
43 Spanish Tumbling


Registered Users do not see the above ad.


Hit the range yesterday with my first rolling block, a 43 Spanish with no markings at all. That's why the price was very reasonable.

Load: Jameson brass; 370 gr cast lead RN Lyman 439186; a hard alloy; 61 grns Goex BP, beeswax/veg oil lube and cookie under the bullet.

Bore slugs at .438

I was optimistic. Someday I'll get over that.

Results: 4/10 rds on paper at 50 yds - and all were tumbling. 0/10 rds on the target stand at 100yds.
The bore slugs out at bullet size, so I suspect the bullets are being swaged down when being seated and then bouncing down the bore.

Some measurements:

Chamber cast -
at case mouth .469
at beginning of throat .454

Fired cases -
mouth ED .459
mouth ID .431- .433

I suspect the bullets are being swaged down too much when seated.

I was thinking of not resizing the cases and hand seating the next round of bullets except that the case mouth is undersized even after firing.

I suspect the BP isn't putting enough pressure on the cases to get them to expand fully upon firing. This is supported by measurements on an unfired cartridge I loaded: it measures .459 at the case mouth with bullet seated. It's not Jameson brass but I think the theory is supported.

I may try loading some light charges with a filler and a wax plug and see if that will blow the cases out to permit hand seating full sized bullets. Or get a bigger expander plug made if Lee will do it. Their standard plug is .435.

Suggestions please?

Kim
Reply With Quote
  #2  
Old 05-06-2017, 06:15 PM
Beartooth Regular
 
Join Date: Sep 2010
Location: NSW
Posts: 418
Check for a carbon ring in the neck area of the chamber it may be stopping necks from expanding.
Scrub the bore and chamber out a few times with a strong solvent .
The cookie may be stopping the cast bullet from expanding into the rifling . We never use such things.
Reply With Quote
  #3  
Old 05-07-2017, 02:56 PM
Registered User
 
Join Date: Apr 2017
Location: central FL
Posts: 4
Thanks Country but I have another problem to sort out first - my digital micrometer.

I decided to ck it against some Hornady and Speer bullets and its measuring low. I've dug out the old analog micrometer and will re-measure everything and post the accurate measurements ASAP so we can work with accurate data.

Thanks again.
Reply With Quote
 
  #4  
Old 05-09-2017, 11:19 AM
Registered User
 
Join Date: Apr 2017
Location: central FL
Posts: 4
Revised measurements:

Chamber cast -
at case mouth .469

Bore: .441
Muzzle: .456

Bullet as cast .441
loaded and pulled .441

Fired cases -
mouth ED .466 - .469

A .451 RB drops into the muzzle almost completely before stopping. Is the belling at the muzzle creating instability when the bullet exits the bore? Countersink the muzzle?

Country - There is no powder ring in the chamber. I had soaked the chamber and bore overnight with Hoppe's No 9 and the chamber and rfiling are good.

Kim
Reply With Quote
  #5  
Old 05-09-2017, 04:50 PM
Beartooth Regular
 
Join Date: Sep 2010
Location: NSW
Posts: 418
I think the muzzle area is worn out . Could be from incorrect cleaning using that ram rod that comes with them , plus shooting .
If the bore is .441 then you want the cast bullet at .442 . Which seems possible from the case mouth size after expansion.
If the muzzle is .456 then the rifling is pretty much gone from the muzzle I would think . Anyway if a bullet gets looser as it exits the muzzle it can suffer the wobbles and yaw .
Try cutting the barrel back to where it's .441 and recrown . If that don't work a new barrel looks to be the best fix and maybe chamber for 45-70 instead .

Last edited by Country; 05-09-2017 at 05:13 PM.
Reply With Quote
  #6  
Old 05-15-2017, 12:52 PM
Registered User
 
Join Date: Apr 2017
Location: central FL
Posts: 4
thanks Country
Reply With Quote
  #7  
Old 05-19-2017, 08:59 AM
Beartooth Regular
 
Join Date: Oct 2006
Location: Woodland Hills, UT
Posts: 222
I agree with Country, but one thing you might try before the cutting and chopping comes into play would be to use a slightly larger diameter bullet (say .449) I have both a .43 Spanish and .43 mauser. the mauser uses .446 (un-sized out of the mold they are closer to .449) and make sure you use pure lead (soft) as they will "bump up" a bit in caliber as you fire them. The only problem you may encounter is that the larger bullet could make for a difficult time chambering the round. My Spanish Roller is pretty finicky.
Reply With Quote
  #8  
Old Yesterday, 03:55 AM
Beartooth Regular
 
Join Date: Sep 2010
Location: NSW
Posts: 418
But the barrel will just size it down to .441 ? Are you thinking gas pressure could size it back up again to .456 before it exits . It never did it before.

Last edited by Country; Yesterday at 03:58 AM.
Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
1915 Spanish Mauser Kman1 Gunsmithing 13 10-18-2016 01:49 AM
A question about my 1895 Spanish Mauser. NiriTawa Ex-Military Rifles & Cartridges 11 03-29-2015 08:34 AM
Tumbling Tip Coffinhauler Handloading Procedures/Practices 19 07-25-2014 08:17 AM
Cleaning Tumbling Media Colohunter Handloading Equipment 29 02-19-2014 04:04 PM
Suggestions For Safe Load In Spanish FR7 Carbine ? PaulN Handloading Procedures/Practices 3 01-29-2012 09:16 PM


All times are GMT -8. The time now is 09:43 AM.

< Contact Us - Shooters Forum - Archive - Privacy Statement >

 
 

All Content & Design Copyright © 1999-2002 Beartooth Bullets, All Rights Reserved
Privacy Statement | Contact Webmaster
Website Design & Development By Exbabylon Internet Solutions
Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1