Author Topic: Question on bullet design  (Read 897 times)

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Offline WayneS

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Question on bullet design
« on: October 13, 2010, 05:11:11 PM »
On the LBT home page there are 4 bullets shown, all have a long nose 2 driving bands and a single "grease groove"  much like the RCBS silhouette  bullets. When looking through the LBT catalog, there are no bullets with this design.
Just wondering if the   bullets on the catalog were just a convience at the time ??

Offline Veral

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Re: Question on bullet design
« Reply #1 on: October 13, 2010, 07:10:03 PM »
 
Thanks for asking, as the world needs to know more about what I offer.

  I make hundreds of bullets which I can't get fitted into the on line catalog, and the ones pictured on the home page are all actually the same bullet, which is pretty much the winningest match bullet available. (It has taken several national bench rest top place in recent years.)   
  I believe the one pictured is a 30 cal at about 200 gr, and it has a one inch radius ogive.  I call it the SP1R.  It's available in any reasonable weight, any caliber from 270 through 50.  Lube grooves, both number and size can be changed, base can be pb, gc or bb, or I'll make them in smooth sided paper patch, normally with a tiny bevel which minimizes paper tearing when twising the tails on.

  This kind of flexibility is available with any nose form you see in my catalog.  If you want ANYTHING that you don't see, ASK!  I can make most customers happy, and often go far beyond what they thought they wanted.  In fact, the catalog only shows one spitzer nose form, I believe, which has a .6 radius ogive.  I also offer a blunter .5 radius ogive, and a .8 radius ogive, in all suitable calibers for the ogive curve of interest.

  One time several years ago I did a bit of adding/calculating, and learned that if all the options I offer were considered, I'd have to catalog at least 10,000 different bullets.   If you want something you don't see, don't hesitate to ask.  Make it personal with a phone call, or email me with your phone number and I'll call you when I can get near a phone.
Veral Smith

Offline WayneS

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Re: Question on bullet design
« Reply #2 on: October 14, 2010, 10:52:56 AM »
Thank you for addressing this.  Now to start the "pondering" process ??? ??? ???

Offline WayneS

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Re: Question on bullet design
« Reply #3 on: October 16, 2010, 10:58:08 AM »
 I notice that these rifle bullets donot have a front driving band  ?? does the nose section "swell" taper up to the driving band Dia.
Since this is your design  with or W/O "swell"  you must consider it the most accurate

Offline Veral

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Re: Question on bullet design
« Reply #4 on: October 19, 2010, 06:31:54 PM »
  When I speak of front driving band I'm talking about the portion of a bullet forward of the most forward lube groove which is full groove diameter or larger.  So, the pictured bullets have a front driving band probably 5/8 of an inch long.   Customers who taper it in so called bump dies, reduce part of this to as small as bore diameter, and it works witchcraft if the rifle throat has the exact same taper so almost the whole bullet is held in the throat upon chambering.  Only one lube groove is adaquate when well over half the bullet has it's diameter reduced to less than groove diameter by bumping.  If this bullet is to be shot at full diameter, sized to fit a straight, or ball seat throat, it will give the best accuracy potential for that type rifle, but top velocity will be lower than if it had more lubrication.
Veral Smith