Appropriate uses for Linotype
- Thread starter S Mac
- Start date
Just checked 4 of John's pure lino bullets on the LBT tester. 3 were 20 BHN and one tested 19 BHN. For my money I would call them all 20 BHN and it is pure lino from Roto.
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I didn't do the math but assuming accuracy with your percentages your previous results with 3/1 alloy are quite close to were they should be.
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In post #19 of this thread he posted his alloy which I quoted here. 3/1 - 3 pounds pure Roto lead to 1 pound Roto lino. By his math it's <3/1 = 96 Pb - 3 Sb - 1 Sn> and accounts for the BHN numbers he got.
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Yeah it makes sense, I think John was comparing his 3/1 alloy with my CWW alloy. A big difference between the two alloys is a lack of a grain modifier in his virgin lino/pure. A 1/4 to 1/2 of 1% As makes a big difference. As is good for much more than solving pesky spouse problems ya know.
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Eutectic
Active Member
A properly engineered cast bullet going very fast and contacting live flesh ......... will even make a V-Max quiver!
Pete
Winelover
North Central Arkansas
I ran across a post by Outpost 75 (most of us know who he is) on alloys made with just pure lead and lino and their projected air cooled BHN.
Lino to Pure ratio:
1-1 BHN @ 13.5 (< than Lyman #2)
1-2 BHN @ 10.5 (close to 1-20 alloy)
1-3 BHN @ 9.25
1-4 BHN @ 8.5 (close to 1-30 alloy)
So boys and girls.......my 1-3 alloy hardness reflects the results of Outpost's.
Last week I cast some 357 RNFP bullets, using 1-2 (lino to pure) Will have Rick test them for BHN values.
Lino to Pure ratio:
1-1 BHN @ 13.5 (< than Lyman #2)
1-2 BHN @ 10.5 (close to 1-20 alloy)
1-3 BHN @ 9.25
1-4 BHN @ 8.5 (close to 1-30 alloy)
So boys and girls.......my 1-3 alloy hardness reflects the results of Outpost's.
Last week I cast some 357 RNFP bullets, using 1-2 (lino to pure) Will have Rick test them for BHN values.
fiver
Well-Known Member
we were just asking.
I mix 3-1 lino and then mix it 50-50 with ww alloy.
I don't see a lot of drop in the ww BHN when I do that, the AS might be why.
but even the 1-1 mix should be the same as teracorp magnum alloy, and I have always seen that at 15BHN.
the numbers aren't all that far apart in most instances but some of them make you re-look and go huh?
I mix 3-1 lino and then mix it 50-50 with ww alloy.
I don't see a lot of drop in the ww BHN when I do that, the AS might be why.
but even the 1-1 mix should be the same as teracorp magnum alloy, and I have always seen that at 15BHN.
the numbers aren't all that far apart in most instances but some of them make you re-look and go huh?
CWLONGSHOT
Well-Known Member
There was a time that I cast exclusively with lino type. I was a printer for 20 years I had access to whatever I needed it cast beautifully. It makes beautiful bullets they're just quite hard they don't expand they are brittle but generally they shoot very well.
CW
CW
johnnyjr
Well-Known Member
Even if powder coated?
I've heard that off & on for years but have never seen it actually happen. A lot of people were shooting straight lino back when it was common and cheap. It fell out of favor in silhouette shooting not because it was abrasive but because it is so brittle on steel targets.
richhodg66
Well-Known Member
Seems like Lyman's recipe for #2 alloy is five pounds lino to four parts pure with a one pound bar of 50/50 solder. I have quite a bit of lino and also pure tin with a steady supply of it from work. This Summer, I want to make up a bunch of #2 alloy and try to settle on using that as much as possible for everything.
RicinYakima
High Steppes of Eastern Washington
FWIW, I was told by one of the best CBA Military shooters that about 25,000 rounds of linotype moved his leade forward about .050". I know I am seating '284's made from linotype farther out after 20+ years of match shooting. Compared to my 1995 dummy round, about half a driving band worth.