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Boosting BC of commerical bullets.....

 
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  #64  
Old 03-26-2013, 09:25 AM
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Re: Boosting BC of commerical bullets.....

Quote:
Originally Posted by royinidaho View Post
"these tips" ???

Someone needs to come up with other choices! And that isn't easy, or inexpensive or non-time consuming. I know!

One tip fits all isn't the best solution to boosting bc. Fitting Corbin's AL tips replaces heavier lead and jacket material aluminum. The smaller the caliber the more heavier material with lighter material.

My bc boost efforts (successful ones ) were with a brass point with a press fit stepped shank into Nosler Accubonds and Ballistic Tips. Base of the point is 0.182" and a meplate of 0.030"

Brass is a bit heavier than aluminum resulting 130/140/150 retipped being nearly 9 grains heavier.

Also $0.85 each is a bit much. One of us had some made and ended up with a $0.77 each cost which in my opinion is also too steep for the typical LR shooter.

Having said that if one of you "Sharks " chips in $15,000.00 I get you more brass tips/points than could ever be use of a specific design. That's the best quote I could get However, I haven't given up. . .
Hi Roy, it's good to hear from you! I completely agree with you on needing some other choices. The aluminum tips are pretty good for most bullets "when you are making your own" but as you stated, you can really upset the balance when you are adding to an existing bullet. Corbins is making a mild steel tip now which weighs 15 grains that might be ok for re tipping but it is too heavy for most of my applications. My 10 twist doesn't like that much weight forward. I had some brass tips made that have a .175" meplat and weigh 12 grains which work pretty well but I used up most of the kids inheritance in buying them I've been thinking about trying to work with a hard poly tip that could be pointed, but as Kirby said, Oh the time and $$$! I think a light tip would work REALLY well with the new 215 Berger Hybrids as they have .4" of air space in the nose anyway......Rich
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  #65  
Old 03-26-2013, 10:03 AM
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Re: Boosting BC of commerical bullets.....

Rich,

There certainly ain't no free lunch!

The 15 grain offerings sound interesting. I'll look into them.

However, my never ending urge to use up my remaining daze doing interesting stuff has me on another quest. I've discovered Zirconium which is interesting stuff.

Also, an 8 twist likes that long front heavy stuff.
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  #66  
Old 03-26-2013, 11:41 AM
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Join Date: May 2004
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Posts: 435
Re: Boosting BC of commerical bullets.....

whittle them tips outta wood !
so we can poke 'em with a sharpened stick ..... lol !

stranger things have been done !
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How is it y'all still don't know the difference between CALIBER and CARTRIDGE ??

"In guns, particularly firearms, caliber or calibre is the approximate internal diameter of the barrel, or the diameter of the projectile it fires."
WIKIPEDIA


"Fear of weapons is a sign of retarded sexual and emotional maturity"
Sigmund Freud
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  #67  
Old 03-26-2013, 01:25 PM
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Re: Boosting BC of commerical bullets.....

"Wood Tips" YEAH!!! Then you could use your super glue Roy!
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  #68  
Old 03-26-2013, 01:42 PM
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Location: Fort Shaw, Montana
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Re: Boosting BC of commerical bullets.....

A high density plastic would be the trick but start up manufacturing is spendy and installation is tricky compared to metal.

Most of the bullets I am modifying are HP design and most of the SMKs have a sizable hollow cavity under the meplat so there is not a dramatic change in finished weight, just finished bullet length.

Been busting on rifles to much the past week to get much testing done. Wanted to do some on Sunday but had to take the chance to get on the range and accuracy test several customer rifles. Next weekend Easter, kids and family events all that weekend so probably not get any more testing done then either.

I will be doing ballistic testing on the 175 gr SMK in 7mm in my 7mm AM loaded to +3450 fps with and without tips.

Also in my 300 AX using a tipped 240 gr SMK compared to a conventional 240 at around 3250 fps.

Then we will be playing with one of my 338 Allen Magnums with the 300 gr SMK loaded to around 3400 fps with and without tips.

Will be interesting to see how they do.
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  #69  
Old 03-31-2013, 02:14 AM
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Join Date: May 2004
Location: Alaska
Posts: 435
Re: Boosting BC of commerical bullets.....

Here's an idea......

instead of modifying manufacturers bullets..

why not get a 3D printer and print as many bullet jackets as ya want in a high BC bullet design, then mix an alloy of lead and tin..(hardcast) pour into the jacket then either drill a hollow point or install one of those tips to initiate expansion...................

if you can print an AR15 and a handgun from a 3D printer, bullets jackets would be a piece of cake....

may not have the accuracy as a conventional bullet but things can always be improved by playing with the jacket thickness to properly engage the rifling for bullet spin and stability.....

3d printer info here.............
3D PRINTED GUN, make a Gun with 3d printer


you could also print all the plastic bullet tips ya want ................
__________________
How is it y'all still don't know the difference between CALIBER and CARTRIDGE ??

"In guns, particularly firearms, caliber or calibre is the approximate internal diameter of the barrel, or the diameter of the projectile it fires."
WIKIPEDIA


"Fear of weapons is a sign of retarded sexual and emotional maturity"
Sigmund Freud
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  #70  
Old 05-19-2013, 01:14 AM
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Join Date: Nov 2008
Posts: 1,047
Re: Boosting BC of commerical bullets.....

Great thread Kirby.

Do you have any updates on how the .375 cal 350gn SMK is performing at long range with your tips.

I have a .375 Cheytac and am looking for a viable option as a long range hunting projectile for it.
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