Kinetically Pulled bullet accuracy?

[sublimaze41]

I was preparing to adjust seating on Sierra 135gr for .308. I didn't want to waste any bullets when checking for O.A.L., so I of course pulled them with a RCBS hammer. There were some brass discolorations where the bullet was seated but other than that unremarkable. In years past I would use the bullets/rounds as fouling shots.

So, does the use of a kinetic puller distort the bullet as to alter it's accuracy?

 

[gfpd707]

Most likely there isn't a perceivable loss.

 

[Bart B.]

Put a rubber cushion in it to make a softer landing for the bullets. Their tips will be less distorted and bent.

 

[mongoose33]

Put a rubber cushion in it to make a softer landing for the bullets. Their tips will be less distorted and bent.

I have a piece of foam rubber in the end of mine to cushion the bullet.

 

[snuffy]

I have a piece of foam rubber in the end of mind to cushion the bullet.

Yeah, it's called an earplug, but I use 2 of them stacked. The bullet tips do not get dinged up then.

 

[rcmodel]

10-15 years ago, there was a company making an electronic bullet balance testing machine.
The name escapes me now, but I think it was the Vern Juenke tester.

But the machine proved as a fact that just dropping a box of perfect bullets on a hard floor would damage the precise balance in half of them or more.

PS: I found a modern version DIY kit!!

http://www.bulletinspector.com/index.htm

rc

 

[MErl]

LOL, $1.3k for an un-assembled hand drawn circuit board and schematic. Even funnier is the "This will not work and we won't refund your money" disclaimer.

A quick glance looks like it measures how the bullet affects the mutual inductance between two coils as the bullet rotates. A way of determining if it is uniform.

 

[Offfhand]

This is getting off the subject, but handloaders who have never seen or heard of one, attached is a photo of a Juenke concentricity comparator as mentioned by Mr RC in above post. Among other uses, I use the instrument for checking variations in cartridge case walls, as shown here.

 

[Arkansas Paul]

Yeah, it's called an earplug, but I use 2 of them stacked.

I stuff a foam earplug into mine as well.
Works like a champ.

 

[Sport45]

So, does the use of a kinetic puller distort the bullet as to alter it's accuracy?

The kinetic puller didn't distort the bullet. That happened when it was seated and crimped.

It will shoot as good now as it would have before.

 

[Hardtarget]

I was given a hand full of 55gr V-max for my AR. I noticed they were pulled bullets so I didn't know what to expect. They grouped very well...better than I expected. After all, it was me shooting! I'm sure a real bench shooter could have seen the truth of the targets, but I was happy.

Mark

 

[Jayhawk Dan]

My kinetic puller causes tip elongation

Many times when using my kinetic puller I find that the tip--either lead or polymer--of the bullet is elongated (slightly pulled from bullet) sometimes. This happens most often when I have to hit the concrete floor more than two-three times. These are rifle cartridges that are not crimped. Anyone else have this experience? Thanks for reading my post!
Jayhawk Dan

 

[Jayhawk Dan]

My kinetic puller causes tip elongation

Many times when using my kinetic puller I find that the tip--either lead or polymer--is elongated (slightly pulled from bullet) sometimes. Happens most often when I have to hit the concrete floor more than two-three times. These are rifle cartridges that are not crimped. Anyone else have this experience? Thanks for reading my post!
Jayhawk Dan