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  • john.k's Avatar
    05-30-2020, 12:47 AM
    I would suggest you forget the old gun for a while and do some load development in a 30-06 in a strong action,like maybe a Rem 700.....so if something odd happens ,the gun will take it........One thing Ive done a bit of experimentation with using a...
    11 replies | 414 view(s)
  • john.k's Avatar
    05-26-2020, 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...
    11 replies | 388 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 | 200486 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 | 200486 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...
    24 replies | 1676 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...
    24 replies | 1676 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 | 2001 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 | 200486 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 ...
    41 replies | 2226 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 .
    41 replies | 2226 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 | 1885 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 | 1391 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 | 2001 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 | 2001 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 | 2001 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 | 1104 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 | 432 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 | 1454 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 | 1454 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 | 781 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 | 1635 view(s)
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About john.k

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About john.k
Biography:
retired mechanic/engineer.
Location:
brisbane ,qld,australia
Interests:
shooting,machinery,bikes
Occupation:
retired

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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