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Long Distance Shooting Discuss tools, techniques, tips and theories of long distance shooting

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  #241  
Old 05-29-2018, 4:44 AM
hubel458 hubel458 is offline
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That bevel in the one fired was just caused by cutting disc removing primer..

About 416 cal bullets............The heaviest 550 gr for Extreme ELR probably be best 8 to 1 twist , in 416 caliber bullets,

and 500 gr 9 to 1, and 470gr 10 to one, Barrels I have 10 to 1.

Now a novel idea is to lighten rear of bullet with small shallow hole drilled in base, might do better long range.which would allow 10 to one barrel stabilize the heavier bullets for ELR.

Have hole maybe 2/3 size of tail end of boat tail...Some going to have to try it to see if it is accurate. Ed.
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  #242  
Old 05-29-2018, 5:37 AM
LynnJr LynnJr is offline
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Ed
.
Wouldn't lightening the boattail just move the center of gravity forward and require even more twist?
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  #243  
Old 05-29-2018, 6:19 PM
hubel458 hubel458 is offline
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No, making bullet nose heavier makes it more stable in flight, needing less spin,

like hollow base 585cal minie bullets only need 48 to 1 twist,or less

while out regular 585 bullets need about 24 to 1.............

By being nose heavy that center of gravity is moved forward

of the center of air pressure, so it acts to lead the point of

the bullet straight, cut down wobble.When center of gravity is behind

the center of pressure, the bullet pushing against that presssure

wants the back to yaw/wobble needing more spin to stabilise it.Ed

Last edited by hubel458; 05-29-2018 at 6:32 PM..
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