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  • john.k's Avatar
    Yesterday, 08:48 AM
    I doubt you would find a better 303 barrel than the Lithgow H barrel.....I installed a new one in a Martini a while ago,set back by a thread and rechambered by a Manson reamer ......the reamer was a major disappointment ,as it seemed to have the...
    10 replies | 272 view(s)
  • john.k's Avatar
    05-25-2020, 09:43 PM
    As to the Robbins gascheck plate ,anyone with a lathe can make one ,although I think the Robbins design isnt actually doing what was claimed .....the main thing the plate does is self adjust,not by being a floating fit ,but by fouling building up in...
    219 replies | 198179 view(s)
  • john.k's Avatar
    05-24-2020, 07:05 PM
    You will find the back of the barrel/sealing face is actually a tight fitting bushing in the chamber ,which can be pulled back and refaced ,or removed and replaced......Just needs a correct expanding puller which is easily made .........the "plate"...
    219 replies | 198179 view(s)
  • john.k's Avatar
    05-23-2020, 02:30 AM
    There is another interesting facet to the rolling block conversions .......in the British musket conversion trials of 1865/66,Remington submitted a 58 rimfire rolling block ,and also a far more unusual rolling block capping breechloader.......I...
    15 replies | 1465 view(s)
  • john.k's Avatar
    05-23-2020, 02:24 AM
    The velocity surprised me.....I assume the loss of pressure from the vent in the equivalent muzzle loader is much greater than I had supposed......This has enthused me to convert my old Zouave replica to a .58 rolling block ,there is a historic...
    15 replies | 1465 view(s)
  • john.k's Avatar
    05-22-2020, 08:19 PM
    If the "process " is from cathode (barrel surface) to the anode (rod) ,then why does the rod disappear?.....Its not as simple as thinking electric current goes "one way".......there is a great deal online about electroplating ,and electrolytic...
    27 replies | 742 view(s)
  • john.k's Avatar
    05-21-2020, 11:19 PM
    One of my IABs looked a bit like that ,I just made a new plate (the original was cracked & micro fissured too) from hardenable steel ,and pulled and corrected the chamber bushing ...........I dont think blackpowder causes that kind of gascutting...
    219 replies | 198179 view(s)
  • john.k's Avatar
    05-20-2020, 08:26 PM
    I remember buying paper bags of powder from Jack Stacey......everything was 1/6- a lb (15c),He never had a cigarette out of his mouth ,except for ladling out blackpowder ,he used to put it on the shelf behind him.You had the choice of 2 kinds of ...
    34 replies | 1126 view(s)
  • john.k's Avatar
    05-19-2020, 11:18 PM
    If you load and fire next day or so ,I dont see any problems ......but I do know the red dust will come back quickly ,and sometimes overnight .....Ive had 4895 turn completely into dust in one week after being sifted .
    34 replies | 1126 view(s)
  • john.k's Avatar
    05-19-2020, 11:08 PM
    You wont be using excessive pressure in the small Martini .....for the simple reason if the primer even slightly craters,the action wont open......Ive had a few Martinis in the 222 rimmed version of 222 Rem,all suffer from the same problems and...
    23 replies | 1827 view(s)
  • john.k's Avatar
    05-18-2020, 07:05 PM
    Good question for powder coat......all plastics contain fillers ,which can include fine silica ,talc,ground glass,ground mica ,alumina,and colours like titanium dioxide .....TiO2 is a very common whitener .So how abrasive are powder coat...
    20 replies | 627 view(s)
  • john.k's Avatar
    05-16-2020, 07:38 PM
    Its actually a plating process .....in effect you are plating iron from the rod onto the steel bore......however ,due to unsuitable conditions ,the iron does not stick to the bore ,but remains as a black powder in the liquid (incidentally ,this is...
    27 replies | 742 view(s)
  • john.k's Avatar
    05-16-2020, 08:24 AM
    If excessive power is used (see above) ,there is a likelyhood of plating a thick iron deposit onto the newly cleaned steel........this rough black deposit is notably hard to shift.Whats needed is fractional amps at 2-3 volts ,in the case of a...
    27 replies | 742 view(s)
  • john.k's Avatar
    05-15-2020, 03:58 PM
    You wont be replenishing anything ...the process simply lifts the oxide from the metal as a fine mud ,or anything else sticking onto the surface ......if you use a weak carbonate solution as electrolyte ,there is little possibility of corrosion of...
    27 replies | 742 view(s)
  • john.k's Avatar
    05-13-2020, 10:01 AM
    Biggest (actually second biggest) mistake made is to use impure ingredients ......government are cunning ,and so arrange about 10% inert material in easily available nitrate and sulfur The combination of the two additives means the powder cant make...
    19 replies | 467 view(s)
  • john.k's Avatar
    05-11-2020, 04:42 AM
    Sounds like its full of rust to me...when they wont come clean ,its generally rust ...Id try electrolysis,then maybe try firelapping .... Well no ,I wouldnt ..Id do proper lapping ,using cast slugs .....For cast bullets ,only precaution is dont...
    10 replies | 387 view(s)
  • john.k's Avatar
    05-09-2020, 07:47 PM
    Strangest accident I saw with hydraulic fluid was an excavator developed a pinhole leak somewhere and as it slewed around back and forth spread a thick fog of oil ,which suddenly caught fire in a huge fireball.The excavator was a biggie ,80 tonner...
    19 replies | 1414 view(s)
  • john.k's Avatar
    05-08-2020, 11:35 PM
    I knew a guy saw a very fine feathery spray coming from a truck crane hose fitting ,and gripped round the fitting with his hand ......his whole hand ended up as a swelled up football shape ,completely useless,and still is......Airless sprays...
    19 replies | 1414 view(s)
  • john.k's Avatar
    05-08-2020, 11:24 PM
    I cant even remember the first reload I did .....but it would have been because my father figured if we had no ammo ,we couldnt be shooting guns when he wasnt there .I also remember casting bullets in moulds made of plaster .And for sure blackpowder...
    24 replies | 671 view(s)
  • john.k's Avatar
    05-05-2020, 09:02 PM
    Twist rate is certainly excessive...a 357 Mag in a rifle would need to be somewhere round 1/20 IMHO.....A 1/12 twist would handle long heavy rifle bullets in something like 35 Whelan...Anyway ,heavier bullets will likely be better ,but velocity...
    20 replies | 944 view(s)
  • john.k's Avatar
    05-04-2020, 08:06 PM
    Overloading machines is never a good idea.....they always break........That said ,if excessive force is needed ,I suggest you look at altering the leverage ratio of the linkage ....this is simply done by redrilling the pivot hole ,and instructions...
    23 replies | 844 view(s)
  • john.k's Avatar
    05-04-2020, 09:36 AM
    Silver blackens with sulfur ,a component of all living things ,which is of course the black on eggspoons ......Nickle does tarnish ,and the tarnish is an oxide ,pale green in colour ,and if attacked by ,for instance ,by hot water ,a darker green...
    36 replies | 2188 view(s)
  • john.k's Avatar
    05-04-2020, 09:25 AM
    john.k replied to a thread value of trees in Our Town
    guy I know was left a big piece of land by his uncle (big as in 20,000acres)....property taxes ,council rates etc were crippling ,so he got the idea of selling some of the trees.....One of my schoolfriends was from a sawmill family,so I put him onto...
    21 replies | 1015 view(s)
  • john.k's Avatar
    05-04-2020, 09:07 AM
    I had a big 26 " mc Culloch for many years...had every accident could befall a chainsaw,including being stuck in falling trees...was never easy to start if left for a month,but cut many a ton of wood..since had mini cheapies.....most recent is a...
    60 replies | 1622 view(s)
  • john.k's Avatar
    05-02-2020, 08:16 AM
    If the 96 is a swede,it will have a rib on the bolt,and no "stepped" 93 or 95 extractor is any good.
    3 replies | 257 view(s)
  • john.k's Avatar
    05-02-2020, 08:13 AM
    Blackpowder military guns often had strange ideas(to us) so they could keep firing after 100 rounds or so put through them.......Thinking these guys who made the guns were primitive dummies is common today ,but quite wrong...similar to the notion...
    13 replies | 698 view(s)
  • john.k's Avatar
    04-28-2020, 07:33 AM
    To improve feeding of the straight sided case.
    1 replies | 239 view(s)
  • john.k's Avatar
    04-28-2020, 07:30 AM
    Barrels come off easily when you have the right equipment....years ago ,when sporterizing milsurps paid a weekly wage ,an old guy used to bend G98 barrels into an L shape ,and use that as a handle to unscrew them.
    58 replies | 2524 view(s)
  • john.k's Avatar
    04-28-2020, 02:07 AM
    if you arent going for super accuracy,329 cast thru a 323 wont hurt anything ,so I d be inclined to save my money and maybe get a lee 323 mould for a lot cheaper......Sizing 329 down to 323 will hurt accuracy just as much anyway,but at least you...
    6 replies | 1675 view(s)
  • john.k's Avatar
    04-28-2020, 01:54 AM
    Despite claims there is not a spec for the MH chamber , if your guns wernt to spec,the Enfield Inspectors would have condemned them quick smart...Anyhho ,consulting the drawing,you see that the neck of a chamber is slightly tapered....from 510 to...
    49 replies | 2384 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