Quote:
Originally Posted by Jim McKee
Milton C Starr,
Can that be translated to ft. lbs at 40 yds & 50 yds?
Thanks!
Jim
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So I found a ballistic calculator I could use and this is what it came up with for 40 and 50 yards .
First a #5 bismuth pellet .
yards fps ft lbs
40 625 2
yards fps ft lbs
50 532 1
Lead #5 for comparison
yards fps ft lbs
40 703 3
yards fps ft lbs
50 622 2
From everything ive read from guys who shoot bismuth on various shotgun forums the majority of them say when shooting bismuth you dropped down 1 size from lead shot .
To see how true that is heres is a #4 bismuth pellet
yards fps ft lbs
50 573 2
So its goings a little slower but retains the same ft lbs at 50 yards as a #5 lead . #4 Bismuth pellet is 2.7grs and a #5 lead is 2.5grs . I believe the bismuth shot is slowing down faster because its light in relation to its diameter because a #4 lead is still moving at 652 fps at 50 yards with 3ft lbs of energy .