Best neck tention for long throated rifle

[Brewz]

Hi Folks

I have purchased a 1981 manufacture Remington 700 BDL Varminter in 22-250. Its in near mint condition and the bore is immaculate, having done little work.

I used my Hornady OAL gauge to determine the seating depth of the Berger 52gn Varmint HP's and Speer 55gn SP's I plan to use in it, and with them touching the lands, they are just sitting flush with the end of the case.

So to hold them reliably in the case, I have a fair jump on my hands, which i cant avoid.

While i was loading up some rounds to take to the range and try out, I was wondering if a loose or tight neck tension would be preferable for accuracy in a long throated rifle where you cant get close to the lands with your projectile.

I use a Wilson neck sizer so bushings are easy to change.

Has anyone played with neck tention variation with a jumped projectile?

Cheers

 

[brxbrad]

Here's what Forster says about it.....
http://www.forsterproducts.com/client_images/catalog19938/pages/files/Bushing_Bump_Neck_Sizing_Die_Instructions.pdf
Read section 3.5
I generally run .001 - .002 on mine.......

 

[Brewz]

Thanks for the link but I'm already up to speed on that part.

I generally use between .001 and .002 myself however, my question was more directed at weather more or less (.001 or .003-.004) is desirable for a bullet that is being jumped a fair bit... say in excess of .050"...... in a long throated rifle where the bullet cant be held in the case to touch the lands.

I have loaded some test loads at .003 neck tention, because that is the lightest i could do with the bushes i had on hand with the Lapua brass i have. Even after minimum neck turning them they are still very thick. I have a 0.249 and 0.250 bushing on order.
When i get them i will try less neck tension and see what it does.

What I am worried about is the fact that the bullet may release from the case before it makes solid contact with the lands. It will be the smallest of times but it still could cause inconsistencies in bullet alignment in the barrel.

If it becomes an issue, I may just take it to my gunsmith and have him knock a few threads off and re-chamber it

Cheers

 

[MagnumManiac]

Wow, the leade is designed to align the bullet regardless of whether the bullet is in the neck or not. No matter how much neck tension you use will not change this, but it can affect accuracy positively when tested, this is the only way to find out if it changes anything, however.
I have several Weatherby chamberings, all have throats too long to seat bullets close to the rifling, but all are very accurate with tuned ammunition, so much so you would never know they were long throated. You will always find a COAL away from the rifling that is just as accurate as close to it with a little experimentation, barrel harmonics aren't fixed and stable at a single length from the lands.

I would load to one calibre deep and tweak in and out from there by .005" increments.

Cheers.

 

[Brewz]

That's a very good point.

I will give it a go and use the lighter neck tension once the larger bushes turn up