Made in 30 cal, and 9mm GC design and flat base .357/9mm.
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Made in 30 cal, and 9mm GC design and flat base .357/9mm.
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Made one in 500 S&W. Fit is snug and perfect! Bottle on top to collect GCs and to aid screwing in.
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Last edited by dimaprok; 06-19-2019 at 03:13 PM.
how are you holding the punch inside? Do you have set screw in side? I tried this except I just used threaded rod and the set screw needs to clear threads, there is just not enough material unless your set screw is below which brings its own set of problems. Do you have picture?
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What does this look like to you guys. It mics at .355. Bought it in a bunch of old stuff.
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Hello. I want to try to make according to your drawing. There are several questions - because I am from Russia, we have all sizes in millimeters. Internal and thread diameter for twisting in the press will remain unchanged. Is it possible to adjust external dimensions?
my uncle is a machinist and will be building me one of these sometime this month, minor modification to make plain base checks from .004 thick pop can aluminum because I am cheap. should be a 0.312 inside diameter on the check (my plane base 30 cal molds all drop between 3105 and 3115), will post results when it arrives
Standard pop cans are .004, there is one brand of coconut water I found to be .005, this is not enough for 30 caliber. The math is simple, you measure the shank and I don't have my notes but if I recall it's .285, you add .005 x 2 and you end up with .295 - that's way under .309-311 so that means the gas check won't crimp and stay on. I found that you need about .012 or more. You might get my with .010 if you PC first.
The secret is close fit between punch and body. I strive between 0 and .001 max tolerance. The original plans called for up to .002, it might be ok for thicker material but I found that you want to get as close as you can for that laser clean cut punch even if I am close to the edge to make a hair thin edge it doesn't fold or nibble the edge.
That is why i am having the checkmaker designed to produce a check with an ID of .312, i will be using them on plain base bullets and thicker material would be undesireable.
I believe Pat Marlin sells something similar and the resulting checks have been given great reviews.
For plain base yes, I'll be making one too soon. Most of 30 cal molds though are not plain base.
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I made the Ed Smith gas check maker but use a mallet, not a loading press (so far anyway). I use 0.019" old gutter material for checks. They extrude a bit but easy to make with a mallet. Might be a bit much for a loading press at that thickness. Not sure about that.
There must be lots of old gutter available so a free source of check material if it isn't too thick for you.
I plan plan on making a PB checkmaker too.
Your checkmaker does form a very nice check. I think I'll tighten up my clearances a bit when I make the next one.
Longbow
My checkmaker took longer than expected but it works pretty good! Checks are almost 60 dollars in Canada and my 3030 hunting/target load is now down to $220/1000 from 280, thats significant for me, the .004 thick popcans are a pita to work with, sometimes they turn sideways in the die during forming and if i do not notice right away the next 10 are ruined.
Edit;
How i fixed it; I raised the forming mandrel with a thin washer so it protrudes into the slot for feeding material and applies pressure to the underside of the aluminum strip during the cutting operation. This prevents the material from having a chance to shift in the 5 thou between being cut and coming into contact with the mandrel,
Last edited by shootsblanks; 06-04-2019 at 01:55 PM.
Shootsblanks,
Look by sage outdoors.com , its very interresting
Super slow reply on my end sorry.
It is a 1 stage, i had issue with the .004 being found between muzzle and target at inconsistant distances, AND in the berm... switched to .012 thick flashing and that was solved, as was my malformed check problem but, after sizing my bullets to crimp on the check the, material forms a convex base, it appears consistant, and does not seem to lead so off to the range.
the groups fired last night are not reliable as i have a sunburn induced flinch at the moment, anything more than my plinker loads is painfull!
i only had the 25 meter range but out of 5 shots i put 3 into 1/4" center to center and the next 2 went almost exactly 1" higher and 1" lower, but were perfect for windage.
I am optimisitic, i believe that had more to do with my shooting than the checks, i will know for sure next week once my burn heals up and i can shoot properly again. I do not believe that an out of square check would manifest perfect vertical stringing that extreme at that short a range
Load was 29.4gr varget under a noe sc311-165, no chrony data yet but estimate between 1950-2000fps
Можешь писать в личку по Русски dimaprok@gmail.com Только увидел твой пост счас.
Last edited by dimaprok; 06-21-2019 at 05:26 PM.
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 |