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Thread: sizing down a .30 cal.... how is it done?

  1. #21
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    Buckshot's Avatar
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    ...........edwin41, one problem I see, and it's probably your MAJOR problem is that the nose of your slug is engraving in the leade. For a bore rider, a small bit of marking by the lands is fine, and desirable. However it is very important that the leading edge of the paper patch isn't getting rucked up when the slug hits the lands.



    This is a 420gr pure lead slug for a .43 Spanish. The leading edge of the patch is just over the turn of the ogive. The slug is swaged, hence has no lube groove to accept the leading edge of the paper, so it's patched over the ogive.



    The above 577-450's are loaded with 405gr soft cast Lee slugs. The leading edge of the patch is OVER the top drive band. The nose is short and does not touch the lands. Helpfull also is the fact that the chamber and leade are designed for PP'd ammo.



    LEFT: This is a 38-55 and as you can see, the lands engrave the slug AND impresses on the patch when chambered. Since the lands immediately engrave upon the paper, the leading edge isn't damaged. On the right is a closeup of another slug (a lube grooved design) patched for use in the afore mentioned .43 Spanish. As you can see, the leading edge of the patch is tucked into a lube groove. The leading edge cannot become damaged.



    The above are 530gr grain soft lead HP cup based swaged slugs for use in a long range muzzle loading rifle. Since the entire boolit is in the barrel sitting on the powder charge, there is no need for any special care required for the leading edge of the patch as it's already IN the barrel

    A good 30 cal slug for sizing down and then paper patching is the Lyman 311284. At 210grs it might be too heavy for your purposes, but what makes it a good design for paper patching (which I've used it for before) is that it has one of the old fashioned 'So called' dirt scraper groove in front of the first drive band. Convenient place to tuck in the leading edge of the patch.

    ..................Buckshot
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  2. #22
    Boolit Master
    Join Date
    May 2012
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    Good info buckshot, but this isn 't my load.
    I patch the 6,5 mm loverin style bullet and yes,
    I also leave the nosesection of this boreriding design bare..

  3. #23
    Boolit Master
    barrabruce's Avatar
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    Well I reckon that youís Are All right on the money
    Ac ww for core.
    I recon that his dies are to small or needs a bigger expansion ball on his die.
    Especially for a marlin.
    If he pulls a bullet I bet his pp is being compressed to 308-9Ē
    The ring if upset lead from seating reveals that it is a tight squeeze into the case neck me and he could be puckering the bottom of the patch out.
    Annealing the case may help too.
    If you twist the tails you donít get that but it still remains that the patch will size down

    If he seats a few in unsized cases and single loads his groups should shrink dramatically.

    My 2c worth.
    Hey Iím still learning the basics
    Last edited by barrabruce; 05-16-2018 at 11:56 AM.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check