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Pellet Swage Die, smooth ogive
Pellet Swage Die, smooth ogive Quantity in Basket: None
Catalog No.: PF-1-SP
Price: $489.00
Shipping Weight: 0.25 pounds
Enter actual diameter in inches:
Enter desired weight range in grains:
Select Nose Shape:
Truncated Cone (TC)
1/2-E Blunt RN
3/4-E Pistol RN
1-E Rifle RN
Luger 9mm shape
2-S Short Spitzer
4-S Short Spitzer
6-S Standard Rifle
8-S Spitzer
10-S Spitzer
12-S spitzer
Ultra Low Drag Secant
Custom Shape (+ $120)
Enter custom ogive specs:
Select base shape:
Flat base
Dish base (shallow concave)
Cup base (up to 1/2 caliber deep)
Hollow base (standard pellet base)
Rebated Boatail
Custom Base (enter specs) +$70
Enter custom base specs:
Select meplat (tip) style:
Solid Flat Tip
Hollow Point (enter specs)
Radius at tip
Diameter of flat tip, inches:
Hollow Point Length (depth):
Hollow Point Diameter (at meplat):
Hollow Point Min. Diameter (inside hole):
Optional Note:
  Additional Flat Base (FB) ($50)
  Additional Dish Base (DB) ($50)
  Additional Cup Base (CB) ($50)
  Additional Hollow Base (HB) ($50)
  Additional Rebated Boattail Base (RBT) ($50)
  I am sending a sample to match (custom work)
This is really the same die as the PF-1-SB (bleed hole, lead swage die), but with a designation that reminds us this is for an air gun, not a shotgun slug, or a black powder rifle bullet, or a handgun bullet. All of those can be made with the same style of die. The air gun pellet is generally a hollow base with about 2-S ogive shape, with or without a hollow point cavity. But it can be whatever you wish.

Smooth ogive air gun slugs The difference between this kind of PF-1 die and the standard PF-1-S is that it has a pressure-sealing, synchronized length (to the depth of the die cavity) so that the chamber or cavity in the die is essentially sealed. The pressure you apply moves the lead to flow up and around any projection on the end of the ejector, which itself seals off the pressure so lead won't go up the ejection pin hole.

The "rod" part of the internal or ejection punch is attached to a "head" by a set screw, so you can replace it. The replacement would need to be a very specific length, held to the nearest thousandth of an inch, so the "sync length" is marked on the die and on your paperwork. It needs to be part of any future order for new or different ejection punches.

The base can be any of the standard ones in the drop down menu, or it can be a custom one that you design. Custom punches require more paperwork, shop drawings and machine time (one-off parts always take more set up time as a portion of total work done than a run of 1000 standard parts, for instance). So they do cost more to make, but the amount is still a lot less than trying to design and make one from a piece of steel, without the right fixtures, jigs, diamond laps, and years of experience. However, if you can use a standard shape and your custom design isn't much different from it, you probably will be better off to do so. Standard designs are quicker to replace in case your brother's little boy decides to wander off with a punch from your bullet making bench!

Smooth ogive air gun slugs This style of pellet needs to be a good fit to your gun's chamber. If it is a nice, smooth fit without deforming when pushed home, it will probably be a good match to the bore as well. If it is too snug, you lose velocity and if it is too loose, you also lose velocity! The right fit is tight enough to keep the air behind it, but not so tight that the barrel grooves are dragging on the bullet full length. The rear of the pellet will slightly expand by being squeezed between the sudden impact of air pressure against the temporary inertia of the pellet mass. It isn't much mass, and the intertia is small, so the expansion is usually just fractions of a thousandth inch. But holding plus or minus 50 millionths inch on the diameter with the swage dies means you can, in fact, get just close enough to assure good air sealing with a very tiny amount of "bump up".

Folks often say that there isn't enough pressure to do that in an air gun. IF not, it might be a spring air gun rather than a PCP type, but still you can design the base so that very little pressure is needed to expand it into the rifling. On the other hand, you do NOT want the muzzle pressure, as the air escapes behind the pellet, to flare out the base! That can cause terrible accuracy, with the same pellet that would be a ragged-hole shooter if the "skirt" thickness around the hollow base were somewhat thicker. The exact amount of skirt thickness on a hollow base bullet is easy to change: just use a different base or external punch, with the diameter of the hollow base projection changed. To get the same weight for the length, you might need to slightly increase the depth of the hollow base to make up for the slightly reduced diameter of the hole. Smooth ogive air gun slugs

There are all things you can do to experiment and discover the optimum design for any specific gun and pressure, which are impossible to do with factory pellets (since you have no control over what they wish to use for dimensions, other than buying a different one that may or may not be exactly best for your gun). You can "tweak" the weight to match the air pressure and chamber, even with the same base and hollow point sizes. Or you can change either hollow point or base shape to shift the balance with a given weight. Or to make the same length weigh less or more! It's like a laboratory on your loading bench.

Smooth ogive air gun slugs

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