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  • 303Guy's Avatar
    Yesterday, 02:54 PM
    In my experiments it was interesting that the same powder charge with and without grits filler produced widely different muzzle blast. Clearly more powder energy was being transferred to the boolit when the pressure was pushed up earlier. The same...
    7 replies | 245 view(s)
  • 303Guy's Avatar
    Yesterday, 12:32 AM
    I have one chamber with a shorter than usual neck. I know it's shorter because longer cases fired in it have this tapered mouth tell tale. Good idea on the 8x57 die. It's interesting that with a head separation there is no gas leak - or at...
    25 replies | 1064 view(s)
  • 303Guy's Avatar
    Yesterday, 12:23 AM
    I experimented with this type of thing some years back. My objective was lower muzzle pressure but with H4227. I used a filler (grits) to raise the pressure. I theorize that it works in two ways - reducing case volume and restricting expansion. ...
    7 replies | 245 view(s)
  • 303Guy's Avatar
    01-13-2018, 05:25 PM
    I'd suggest wrapping to just fit an unsized neck. I aim for enough interference that I can start the boolit seating by hand then finish in the press. Printer paper makes this easier since it is more compressible. I roll the patched boolit on the...
    2 replies | 163 view(s)
  • 303Guy's Avatar
    01-13-2018, 05:09 PM
    303Guy replied to a thread Enfield Headspace in Military Rifles
    I have a martini 303 carbine barrel on a Lee Enfield action that has a very tight chamber. There is no visible expansion on a fired case and the shoulder does not move forward. But before I fitted this barrel to a 'new' action, the headspace was...
    25 replies | 571 view(s)
  • 303Guy's Avatar
    01-09-2018, 03:48 AM
    I know a printer paper patch can stay on all the way to the target. I have samples. I have thought about a sabot type patch and even went as far as making a sabot 22LR cartridge projectile for my 25/303. It was a live round so I never fired it. ...
    18 replies | 588 view(s)
  • 303Guy's Avatar
    01-05-2018, 03:04 AM
    I read an article just this morning on how 2400 blew up a Contender in .475 JDJ. Detonation was blamed. Large case (45-70), small charge, heavy boolit (.458), fireforming for the .475.
    74 replies | 4680 view(s)
  • 303Guy's Avatar
    01-04-2018, 06:35 PM
    Or the PPSH Shotgun Slug.
    3 replies | 146 view(s)
  • 303Guy's Avatar
    01-04-2018, 06:33 PM
    This is interesting. Anyone seen this?
    3 replies | 146 view(s)
  • 303Guy's Avatar
    01-04-2018, 11:38 AM
    303Guy replied to a thread Strange things you see in Cast Boolits
    I made a nose pour mold that use a G/C to close the mold base. The G/C was slightly expanded first then inserted to the required depth using a tool I made.
    18 replies | 1163 view(s)
  • 303Guy's Avatar
    01-04-2018, 04:22 AM
    Looking forward to your results. I'm hoping to shoot off a few paper patch rounds this weekend. It's been a long time for me.
    14 replies | 753 view(s)
  • 303Guy's Avatar
    12-29-2017, 03:16 PM
    For the 303 Brit, I had a workable paper patched boolit that I designed for use on small game as well as feral pig. The only small game I shot with it were turkey and it worked very well for that. Performance was great. Full penetration of course...
    25 replies | 955 view(s)
  • 303Guy's Avatar
    12-28-2017, 12:24 AM
    I have some South African PMP cases. They have a smaller capacity than all the others I have measured. So perhaps the web area is thicker and stronger. I used them in my short barrelled pig gun because of the smaller case capacity. I made a...
    25 replies | 1064 view(s)
  • 303Guy's Avatar
    12-27-2017, 08:07 PM
    Many years ago there was a news report in which a 22lr bullet entered a U-shaped bent pipe in the berm. The bullet struck either the shooter or someone else at the firing line in the heart, killing them.
    37 replies | 1541 view(s)
  • 303Guy's Avatar
    12-27-2017, 12:48 PM
    If the chamber is tight to start with but there is a headspace issue (which is what causes head separation) then the O-ring is hard to use as it has nowhere to go. In that case one is only trying to set the shoulder to headspace on. Something I...
    25 replies | 1064 view(s)
  • 303Guy's Avatar
    12-27-2017, 12:38 PM
    I have a 'light' boolit plinking round I had forgotten about that is subsonic. It came about from trying to get my 'rust textured' two-groove 303 Brit to shoot cast/paper patched. It didn't work in that rifle but was very accurate in my short...
    35 replies | 1336 view(s)
  • 303Guy's Avatar
    12-27-2017, 02:03 AM
    I mentioned earlier in this thread (years ago) that I've shot cast in my rust textured two groove Longbranch. It wasn't accurate but the 217gr smooth side patched boolits I was firing went nose first. I also fired plain cast 225gr smooth sides but...
    32 replies | 8653 view(s)
  • 303Guy's Avatar
    12-26-2017, 07:57 PM
    I somehow doubt stearic acid is the cause of corrosion. Paraffin wax as used in candles had stearic acid in it. It is added to raise the melting point. Stearic acid is good flux and can be used...
    36 replies | 10210 view(s)
  • 303Guy's Avatar
    12-26-2017, 03:43 AM
    I can't say that I have any chambers that seriously bulge the cases. To me the important thing is to centre the case so that they remains concentric on each refiring. Something that I have found, is that with loading new cases, they tend to seat...
    25 replies | 1064 view(s)
  • 303Guy's Avatar
    12-26-2017, 03:14 AM
    Actually, the images didn't come through at all. I edited my original post and while the image links showed in the edit, nothing showed in the post but now they do. I still can't make the images larger but if you look closely you can see the...
    16 replies | 1417 view(s)
  • 303Guy's Avatar
    12-25-2017, 05:56 PM
    I would imagine wax would work. The idea is not to prevent case to chamber wall grip but to reduce it so that the case can creep, thereby spreading the elongation over the full length of the case. With reduced loads and new or FL sized cases I lube...
    25 replies | 1064 view(s)
  • 303Guy's Avatar
    12-25-2017, 05:41 PM
    I don't know what happened there. The pics were there! I reinserted the pics, no changes apparent but now the pics show. Go figure. Here they are again.
    16 replies | 1417 view(s)
  • 303Guy's Avatar
    12-25-2017, 04:59 PM
    I also lube my loaded cases. My cases last forever or the neck splits ir they get lost, whichever comes first. I also don't load to max pressure. Actaully, I have some cases that have worn out rims from chambering ahead of the bolt.
    25 replies | 1064 view(s)
  • 303Guy's Avatar
    12-22-2017, 02:17 PM
    I have a mint 2-groove (Longbranch) sporter with scope that needs to be tested with cast or paper patch. It's waiting on a suppressor.
    32 replies | 8653 view(s)
  • 303Guy's Avatar
    12-21-2017, 02:44 AM
    My range would be between 1500 and 2000, so I selected 1700 and above. I need enough velocity and pressure to fragment the patches at the muzzle (although I do have a load that keeps the patch on to the target but that needs development). My...
    35 replies | 1336 view(s)
  • 303Guy's Avatar
    12-20-2017, 05:38 PM
    The rifling as seen at the muzzle is still pretty good. It may benefit from recrowning just to sharpen the rifling edges at the muzzle. Try this one. Believe it or not but this bore cleaned up and shoots paper patched well enough. Ok so...
    28 replies | 2588 view(s)
  • 303Guy's Avatar
    12-20-2017, 05:28 PM
    I fired this patched boolit into my test tube on Sunday. It passed through three bunched up rags (got caught in the last one) and a foot of lightly compressed ground rubber tyres. As can be seen, the patch is still firmly attached to the...
    16 replies | 1417 view(s)
  • 303Guy's Avatar
    12-20-2017, 11:32 AM
    303Guy replied to a thread Handy spreadsheet in Cast Boolits
    :drinks: I made a small addition to Bumpo's spreadsheet to show percentages by mol. I also added a column for alloying additions which was handy for me. The idea of showing mols is for supposed balancing of constituents.
    3 replies | 429 view(s)
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About 303Guy

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About 303Guy
New Zealand
Hunting, Camping, Shooting


Rest In Peace My Son (01/06/1986 - 14/01/2014)

''Assume everything that moves is a human before identifying as otherwise''


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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