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  • john.k's Avatar
    Today, 12:09 AM
    Ive seen mentioned that WRA would re heatreat early blackpowder actions to make them suitable for smokeless conversion.Most likely the depth of case was increased ,possibly with a less hardness in the final draw.If the action is OK with a 45 at say...
    11 replies | 225 view(s)
  • john.k's Avatar
    Yesterday, 11:58 PM
    Lots of 303 chambers have the shoulder formed as two intersecting segments of a circle.....very few have sharp angles with cone connection.....and there are all the inbetweens with small to large radii instead of an shap angled shoulder..........Roy...
    13 replies | 255 view(s)
  • john.k's Avatar
    12-03-2019, 11:55 PM
    I caused a couple of tiny ring bulges in my chamber using wads on top of fast powder......only took about 100 rounds ,when I noticed extraction effort was way up.........I lapped the chamber with (a) a 30-30 case ,split to remove the neck base...
    13 replies | 255 view(s)
  • john.k's Avatar
    12-01-2019, 09:31 PM
    What a lot of complex waffle......simple to pin gauge the bore ,then slug and measure any diameter.....this will be the pin diameter plus one groove depth......deduct pin from diameter gives groove depth,which can be assumed regular....Question is...
    18 replies | 494 view(s)
  • john.k's Avatar
    12-01-2019, 09:16 PM
    If the piece has any weld filled holes ,these can turn out all sorts of colours ,bright pink blending into green is my favorite......The colours are of course light refracted by the thin layer of oxide ,for the most spectacular blue by this effect...
    10 replies | 493 view(s)
  • john.k's Avatar
    11-30-2019, 08:03 PM
    My experience of nitre bluing ,or any other heat oxidation,its very thin,and wears away quite rapidly if the gun is handled........but lovely colours for a glass case piece.
    10 replies | 493 view(s)
  • john.k's Avatar
    11-28-2019, 08:22 PM
    john.k replied to a thread Savage Lee Enfield in Military Rifles
    I bought an early Savage with 6 groove rifling and proper sight the time I thought it was an M17 .....yeah I was pretty dumb at 12 yr old.......upside was it only cost $5 ,my bean picking money....The local hardware store had a guns...
    17 replies | 624 view(s)
  • john.k's Avatar
    11-28-2019, 08:13 PM
    The cordite Mk 7 round produces very little flash,mainly just few red particles.....Some modern factory ammo has a monumental flash ,nothing would hide it....But carbine length barrels are the norm now anyway,like loud cars , seems the need to be...
    8 replies | 353 view(s)
  • john.k's Avatar
    11-23-2019, 08:13 PM
    Another option is photo etching.If you only need lines ,then you could easily etch it yourself....Of course ,any engraver ,including a beginner could chisel some graduations .
    5 replies | 327 view(s)
  • john.k's Avatar
    11-23-2019, 07:52 PM
    That is a very rapid twist for a 357.....basically,it will stabilize any bullet you would care to use....Not very ideal for blackpowder ,tho.
    7 replies | 433 view(s)
  • john.k's Avatar
    11-23-2019, 07:45 PM
    There is a fundamental difference in the silver solder of the past and present......cadmium......however in the days of Ballard and Marlin,silver solder was basically silver .copper ,zinc.,in varying proportions the 20th century ,it was...
    5 replies | 378 view(s)
  • john.k's Avatar
    11-23-2019, 07:35 PM
    RR ,if you want your 54IAB to work 100% reliable,reduce a nipple to hold a berdan primer......if you cant get berdan primers ,then I would just remove the anvil from ordinary primers.....Now I shouldnt say this,but using berdan primers ,the flash is...
    7 replies | 415 view(s)
  • john.k's Avatar
    11-20-2019, 06:25 PM
    I remember great stacks of these,covered in a sort of blue grey mould growing on the oil in the stock.The little "nub" on the firing pin nut may restrict up and down play,but it also performs a very important function of stopping gas blowing into...
    9 replies | 434 view(s)
  • john.k's Avatar
    11-19-2019, 07:25 PM
    note the headstamp...RP...notorious for cribbing the last microgram of brass by making rims way under spec........Headspace excessive by virtue of brass rim being a lot under spec thickness.........cure ,dont waste your money on Remington Peters...
    33 replies | 1747 view(s)
  • john.k's Avatar
    11-18-2019, 07:57 AM
    I had increasingly difficult extraction with a Ross 303 and light loads/lead cast..........found out what I was doing was putting a small ring in the chamber,caused by the fast powder.....I had to lap the chamber ,not to eliminate the ring,but to...
    33 replies | 1747 view(s)
  • john.k's Avatar
    11-15-2019, 09:19 PM
    Id second roundball,as more than once has a bullet got jammed ,and heavier blows to move it have resulted in bulging the barrel......... be sure the bore is oiled...............and dont hit the muzzle with a hammer.
    18 replies | 990 view(s)
  • john.k's Avatar
    11-15-2019, 09:10 PM
    I believe the metric system Marlinman is taliking about is BA...British Association.......indeed a metric thread,but a very complicated one,designed to provide a series of threads down to a few thou diameter....The thread starts at 0BA,which is...
    14 replies | 730 view(s)
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About john.k

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About john.k
retired mechanic/engineer.
brisbane ,qld,australia


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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