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I'm a bit like Brian, got the info, just never remember where.
Murphies alive and well in my house, Brian..check B.A Temples books on 303 ammunition, I will check mine, at least I know where they are.
On bump up measurements, yeah...had a notebook full of various measurements, can't find it, I will trip over it when this thread has faded into obscurity....that's Murphy for ya.
A plastic tip inserted before the lead in place of the original would work. Just a bead that would conform to the shape as the lead is pressured in would also work.
Thanks to all. It's a set of B.A. Temple's books I've misplaced. I used to sell them. I found one spare ID manual for blank ammo left here.
I measured both the Dominion and Radway Green projectiles and they're right at .310 -.310.5 in diameter. I'm sure Sierra would make them a true .311 diameter. I've measured several of the 180 Pro Hunter and 174 Matchking projectiles and they are .311.
I have a number of drawings for the Mark VII bullet so will scan the best later today and mail to you.
I even have an original 1910 Royal Laboratory coloured print of the bullet but it is very large. I will see what I can do.
BTW, the picture posted above is from the British Pamphlet 11 on Small Arms Ammunition.
Regards
TonyE
God................., Brian if only you'd asked all this a month or so ago. We had pages and pages of technical detail, drawings lead composition data.......... In fact EVERYTHING you'd ever need to set up a projectile factory. But it's all unavailable for the next XX months.
All of a sudden, these questions and wants come tumbling down, like the No8 boltheads. Had loads of them but............... It's sooooooo frustrating
Here is a decent drawing of the Ball Mark VII bullet. I will dig out the internal details and post shortly.
I have also e-mailed it as requested.
Regards
TonyE
Well you've done it now Brian, here I am time wasting cutting bullets lengthwise just to see what it's all about.
Attachment 37005Attachment 37006
It's not hard to see where the aluminium finishes, note the small hollow in the tip of the Indian pill on the left.
Both the Indian and Australian pills were 174+/- 1/10 gr.
Here are a couple more drawings that may help. The larger one is from the original 1910 RL 17069 drawing.
Regards
TonyE
TonyE, Can you just scan me the single projectile design drawing? It's perfect and all I need. Brian
It's a bit like hunting UFOs: they're out there, somewhere! (Maybe).
It is interesting that the filler is so closely pre-formed. Bullet jackets, whether ball or "sporting" type, BOTH start out as essentially cylindrical with a radiused closed end. ( a LOT like cartridge cases, in fact.).
They then get run through a series of dies to achieve final form.
Conjecture: If the "filler" material is malleable enough, then a simple cylindrical pellet of the stuff inserted in the blank jacket before the core SHOULD conform to the profile as the outer jacket it is formed. The point pressures available on even small hydraulic presses are quite large. You can buy hand-cranked caneluring machines or you can simply rely on a Lee "Factory Crimp" Collet tool to do the trick after seating.
I have watched a mate of mine crafting his own bullets on his Corbin gear; pretty nifty, but he only makes hollow-points for a specific task. I have swapped emails with Mr. Corbin himself and the deal is that whatever you want to make, they have the technology if you have the funds.
The beauty of the Corbin thing is that if you want a .3125" diameter bullet with a funny core and a stepped ogive, they will set the tools up for the job. Up-front numbers are a bit daunting at first. However, used correctly, a set of tools and machines will produce many tens of thousands of projectiles without appreciable wear. And it's something useful to do when you are snow-bound in your cabin.
And no, I am not on a commission from Corbin.