Corbin's ULD Bullet Tips increase the BC of the already ultra-low-drag secant ogive, rebated boattail
ULD bullet design, in calibers from .284 to .458 (using TIP-30) and calibers from .458 to .510 (using TIP-50).
Available in packages of 500, the ULD tip inserts are installed using the PF-1-ST or PF-1-HT point
forming and tip inserting die (which replaces the standard PF-1 point former when making high BC ULD tip
Corbin PIN-POINT tip inserts with 25-degree nose cone make high BC bullets practical in cartridges with limited OAL, as well as airgun pellets,
muzzle loader slugs, saboted lead bullets and big bore handguns. In a range of 9mm to .510 caliber, the PIN-POINT insert used with a PIN-POINT ogive
PF-1-ST or PF-1-HT die set provides low drag, and impressive terminal ballistics. Typical ogive shape for 45 and up is aproximagely 4-S.
The ogive curve is adjusted for a smooth transition, in the 2-S to 3-S range for smaller diameter bullets. Exact ogive depends on caliber and is determined by the arc angle required to match the 25-degree conical section at the diameter of the insert conical base. The ogive cannot be randomly selected, nor the tip inserted into various ogives, without causing an abrupt change in the combined ogive shape. Each caliber is engineered specifically for best ogive curve.
- OAL .715-in
- Base of cone diameter .209-in
- Stem diameter .100-in
- Cone length .435-in
- Stem length .280-in
- Cone angle 14-deg.
- Wt. 14.5 grains
- OAL .812-in
- Base of cone diameter .260-in
- Stem diameter .110-in
- Cone length .500-in
- Stem length .312-in
- Cone angle 14-deg.
- Wt. 24.2 grains
- OAL .495-in
- Base of cone diameter .210-in
- Stem diameter .100-in
- Cone length .235-in
- Stem length .270-in
- Cone angle 25-deg.
- Wt. 9.2 grains
Clients often ask if we can make a different or special shape of tip, make tips for smaller calibers or make it of a different metal such as aluminum or brass, etc. We can
and have made the tips from other metals, but softer metals cause problems with deformation, lower accuracy due to bending and deflection both in production at high speed and
in handling and swaging, recoil in magazine rifles, etc. The 41L42 zinc plated tips have proven better for accuracy and production quality. It's a case of "been there, done that."
It didn't work nearly so well as what we are using now.
Making smaller tips for calibers under .284 diameter presents a cost problem. Yes, it can be done. But the problem is that the high speed CNC production that maintains good cost and
still has fine tolerance control with larger tips fails with smaller ones due to deflection from cutting pressure. Changing to a Swiss-type screw machine solves this issue, but the speed of production drops, so that the cost per part soars. As with many ideas, it can be done but you wouldn't want to pay what it costs to do it to the necessary precision once
the diameter drops below what we found works well.
As to making different angles, sizes, special runs, even with large enough diameters to use CNC turning centers, the minimum production run that will keep the cost per part anywhere
near a reasonable level is 100,000 parts. Any smaller runs divide the set-up, programming, metal purchase and shipping, labor and machine time costs by too small a number to
give you a good price per part. So yes, it can be done. Yes, we can take a special order for your custom tips made of whatever you wish. But the cost per part will necessarily be
far higher than our optimized cost standard parts, and the minimum quantity will be at least 100,000 parts. (Or you can have one part for the same price! Overhead is the same to get to that point.)
There are still a few folks who will present endless arguments proposing how it should be possible to make them cheaper, in less quantity, out of Unobtainium Alloy, etc. We already know from experience what works both technically and economically, which is why we offer what we do now. So to save time for everyone, if you still insist that you can get a different design using another material in less quantity for lower cost, the bottom line is to please ask a CNC machine job shop for a quote. If they can do it for the price and in the quantity and quality you find acceptable, you won the lottery! We'd be happy for you.
If you find it can't be done, we are still here with a design that works and can be purchased in lots of 500 or more.