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Re: Cast boolits in a 4(T)
Posted: Mon Jan 31, 2011 5:34 pm
by dromia
John25 wrote:Sandgroper says
"Gas cutting, well I'm not sure about that. I've retrieved many shot cast boolits over the years, as have many others, and never seen any gas cutting especially on the base, the temperature spike is there for so short a time that it doesn't seem to melt the lead."
I have a number four spike bayonet frog (I know I should have taken it off!!) coated grey with lead after a hot load - no gas check. - Nothing reached 100x!
Poor boolit fit.
Re: Cast boolits in a 4(T)
Posted: Mon Jan 31, 2011 6:56 pm
by ovenpaa
Adam, how do you cold cast your chambers?
Re: Cast boolits in a 4(T)
Posted: Mon Jan 31, 2011 7:24 pm
by dromia
I presume by that you mean the impact method?
It is certainly my preferred way of getting a throat/lead/groove slug. It is perfectly explained in Texasmacs article reproduced in the Library here:
http://www.full-bore.co.uk/viewtopic.php?f=36&t=855
Take that as a basis then ask about anything you may want clarification on.
Re: Cast boolits in a 4(T)
Posted: Mon Jan 31, 2011 7:39 pm
by ovenpaa
Drat, I read that a while ago as well
Re: Cast boolits in a 4(T)
Posted: Tue Feb 01, 2011 9:25 am
by dromia
Funny how age creeps up on your faculties.
:(
Re: Cast boolits in a 4(T)
Posted: Sat Feb 12, 2011 6:04 pm
by ovenpaa
The taper mandrel is taking form, loving turned from stainless steel it has only taken a cup and a half of tea so far, pictures may well follow in a while......
Re: Cast boolits in a 4(T)
Posted: Sat Feb 12, 2011 9:01 pm
by ovenpaa
Top to bottom: SincInt Mandrel die, mandrel middle and boolit hand pushed into case. The dark lines at the throat end of the case and on the mandrel are where I smoked it to check for fit.
I currently have +.002" on the diameter of the gas check which allows me to push the boolit in by hand as far as shown, then reduced to give .002" of neck tension on the boolit. Seems OK so far and I will build a couple in the morning to see how they look. I used a fairly hard stainless for the mandrel as it is still in the experimental stage.
Re: Cast boolits in a 4(T)
Posted: Tue Feb 22, 2011 7:41 am
by dromia
Very nice indeed.
Will I pm you my list and do you do reduced prices for bulk orders? :lol:
Next up for you are compression plugs, I need them in .577", 17mm, 12 mm, .43" for starters.
Re: Cast boolits in a 4(T)
Posted: Tue Feb 22, 2011 8:15 am
by ovenpaa
dromia wrote:Will I pm you my list and do you do reduced prices for bulk orders? :lol:
Next up for you are compression plugs, I need them in .577", 17mm, 12 mm, .43" for starters.
This one was made with a piece of 20mm stainless bar so it took a while, not sure I ready to give up my day job quite yet... :?
What are compression plugs, let me know and I will have a look. I am thinking of investing in a slightly more robust lathe and have a load of projects in mind so adding more to the list all helps the business case.
Re: Cast boolits in a 4(T)
Posted: Wed Feb 23, 2011 12:59 pm
by dromia
Stainless steel is a tad over engineering methinks.
Compression plugs are used to compress black powder in black powder cartridges, it helps with consistency of burn and reduces fouling. Most types of BP respond to compression to some degree.
Here is a 45 cal compression plug turned out of brass to fit a Lee expander body.
