snuffy
06-01-2008, 10:03 PM
Range report-cast lead 45/70
Not to spout off on any supposed skill, just a thread about how different alloys do different things. The first two pics are using a 20 parts pure lead to 1 part tin. Oh the load is as follows. 340 gr. Lee 2 cavity mold RNFP, 27.5 grains of surplus 4759, new starline nickel plated brass, winchester large rifle primer. Rifle is a H&R buffalo classic SS sporting a 3X9 B&L scope. Range was 100 yds, temp was low 70's slight breeze. (beautiful early summer Wisconsin weather!) (finally!).
http://photos.imageevent.com/jptowns/arrow/websize/340%2020-1.jpg
http://photos.imageevent.com/jptowns/arrow/websize/340%2020-1-2.jpg
This next picture is the same load as above, the difference is the lead alloy. These were a mix of some dead soft, nearly pure lead I got from a scrapped machine counter weight. Mixed with linotype metal, 17 lbs. weight metal to 3 pounds of lino. BHN is around 15.
http://photos.imageevent.com/jptowns/arrow/websize/340%2017-1.jpg
The group is over 6 inches, the best of the first two is 2.138 Not bad for an old f**t and an inexpensive single shot rifle!
Oh, the chrono readings are as follows:
Best of 2 5 shot strings with the harder alloy.
AV 1610
hi 1652
lo 1568
ES 83.3
SD 30.6
AD 20.5
Then a 10 shot string for the 20-1 alloy
AV 1573
HI 1605
LO 1561
ES 44.5
SD 13.1
AD 8.5
Why the higher vel. with the harder lead? I dunno. The worse readings,(the first string), were 83.3 ES, and that is the last group pictured.
__________________
TANSTAAFL
The more people I meet, the more I love my dog
with my past forgiven, my present secure, and my future guaranteed, what me worry?
"A simple way to take measure of a country is to look at how many want in, and how many want out."--Tony Blair Speaking of America!
Not to spout off on any supposed skill, just a thread about how different alloys do different things. The first two pics are using a 20 parts pure lead to 1 part tin. Oh the load is as follows. 340 gr. Lee 2 cavity mold RNFP, 27.5 grains of surplus 4759, new starline nickel plated brass, winchester large rifle primer. Rifle is a H&R buffalo classic SS sporting a 3X9 B&L scope. Range was 100 yds, temp was low 70's slight breeze. (beautiful early summer Wisconsin weather!) (finally!).
http://photos.imageevent.com/jptowns/arrow/websize/340%2020-1.jpg
http://photos.imageevent.com/jptowns/arrow/websize/340%2020-1-2.jpg
This next picture is the same load as above, the difference is the lead alloy. These were a mix of some dead soft, nearly pure lead I got from a scrapped machine counter weight. Mixed with linotype metal, 17 lbs. weight metal to 3 pounds of lino. BHN is around 15.
http://photos.imageevent.com/jptowns/arrow/websize/340%2017-1.jpg
The group is over 6 inches, the best of the first two is 2.138 Not bad for an old f**t and an inexpensive single shot rifle!
Oh, the chrono readings are as follows:
Best of 2 5 shot strings with the harder alloy.
AV 1610
hi 1652
lo 1568
ES 83.3
SD 30.6
AD 20.5
Then a 10 shot string for the 20-1 alloy
AV 1573
HI 1605
LO 1561
ES 44.5
SD 13.1
AD 8.5
Why the higher vel. with the harder lead? I dunno. The worse readings,(the first string), were 83.3 ES, and that is the last group pictured.
__________________
TANSTAAFL
The more people I meet, the more I love my dog
with my past forgiven, my present secure, and my future guaranteed, what me worry?
"A simple way to take measure of a country is to look at how many want in, and how many want out."--Tony Blair Speaking of America!