Reseating bullets

[WelshShooter]

What are you going to be using them for? If it's just for informal shooting then don't bother with any neck sizing. If you plan to use them for competition then I would neck size just to ensure consistency within the batch.

[snayperskaya]

For consistency sake, it would be the best thing to neck size the rounds before seating them again. You may be able to use what little elasticity was in the case neck after kinetic pulling, but it's not going to be consistent between pulled rounds, and non-pulled rounds, so if you have 20 rounds of pulled and then make 20 more from scratch, the neck tension will differ and you could get different results on target.
Also with slightly less neck tension, there's always the possibility of a round getting hung up on the lands and in the rare event you need to unload, pulling the bullet out and emptying powder into the chamber... - I know, I know, the chances are slim, but it's happened to me before :(

The neck tension consistency was what I was thinking, mine were collet pulled but neck tension varied so I neck sized the lot for peace of mind if nothing else.

[Berger]

How many have you got to pull.
If they are accurate but slower than requirements why not just shoot them off at mcqueens

[Racalman]

How many have you got to pull.
If they are accurate but slower than requirements why not just shoot them off at mcqueens

I have about 30. The bullets are 185gn Berger Juggernauts and the primers are Federal Gold Match. I shoot them in 1,000 yard snap competitions and the components are a bit over the top for the McQueen. Since loading them I found a better powder weight and want to bring them up to scratch.

I tried the new powder weight on the electronic targets at 1,000 yards on Stickledown last weekend and four of my five round group were in the V bull

[ColinR]

While on the subject of neck sizing, whether using a bushing die or a standard sizing die externally on the neck there will be variations in the tension on the bullet due to variances in wall thickness as effectively you are only sizing the outside of the neck when it is the internal dimension and trueness that is most important. For this reason I use a bushing die to reduce the external neck to give a nominal internal dimension around 0.003" less than the bullet diameter. I then use a Sinclair carbide plug to size the internal dimensions of the neck to give a consistent neck tension. I tend to use 0.002" less than the bullet diameter - for .308 a .306 plug. This not only gives a consistent internal dimension and neck tension, but also tends to true up the necks. As said previously external neck sizing alone will affect the internal dimension due to variances in the neck wall thickness, so a thicker neck wall will create more tension on the bullet and conversely a thinner neck wall will reduce the tension.
Sizing the neck internally is the only way you will get the most consistent tension, be that from the same batch or from different manufacturers.

[Berger]

It ain't worth messing pulling 30.just bang them off at mcqueens.

[Racalman]

Sizing the neck internally is the only way you will get the most consistent tension, be that from the same batch or from different manufacturers.

I'm with you there and if I shot benchrest I probably would do that, but our snap shoots are rapid fire with a fairly high round count and I spend enough time reloading as it is.

[Berger]

How do you know if the neck tension has changed if you have pulled the bullets.have you got a neck tension measuring gadget.

[Racalman]

Sizing the neck internally is the only way you will get the most consistent tension, be that from the same batch or from different manufacturers.

If I was shooting benchrest I probably would invest the time to do that, but our COFs are shot quickly off a bipod with a high round count so I'm not after the last ounce of perfection.

[ColinR]

How do you know if the neck tension has changed if you have pulled the bullets.have you got a neck tension measuring gadget.

You don't need a gadget. Just try seating a new bullet into a case from which the bullet has been pulled and you will find the seating resistance considerably reduced. The original seating would have had a sizing effect on the internal dimensions of the neck.