Which neck bushing are you using?

[CJW]

What size bushing are you using for Laupa brass with a Redding die?


Chuck

[BobinNC]

Chuck,

Bushing sizes are bass and bullet dependent.

My 6.5 Grendel uses Starline Brass with 120 Grain Speer Gold Dot. This loaded round combo measures .290". If I was ordering a bushing I would use a .288" one. It wouldn't matter to me if the bushing was a Redding or Hornady one.

If I loaded a different bullet into the same brass I might be using a .289 or a .287 bushing to achieve the correct neck tension with that particular bullet.

Perhaps this thread may help.

http://www.65grendel.com/forum/showthread.php?5671-Another-on-Redding-bushing-dies

Best of luck,

Bob

[CJW]

Thanks Bob.

[Klem]

Chuck,

Depends what neck tension you want. For a bolt gun .001-.002" is enough, without working the neck more than it needs. For a gas gun most prefer more tension as they get bashed about going into battery. So, around .003-.004".

While the calibre is .264 there are variations between bullet diameters. I find this depends on who's making them (brand). Hornady bullets are .264 while TNT90's are .263. Nosler bullets are in between at .2635".

I use a Redding bushing die with Lapua brass for 6.5x47. I use Lapua brass for both Grendel and 6.5x47. The neck wall thickness is the same in both calibres....Both on the thick side at .013" (Lapua brass is thick). I use a Redding '288' bushing for the bolt gun and this gives .002" of neck tension.

For Grendel I don't have a bushing die and use a Forster without the expander ball. It crushes the neck tighter to an OD of .2865". This imparts more grip to the bullets.

Here are my Lapua neck tensions for different bullets using a neck sized to .2865". If you want a smiilar grip for a gas gun then bushing # "286" with Lapua brass will work. Expect brand new brass to be a bit thicker (.0135") and more elastic so might spring back .001". The spring-back cancels out the new brass thickness so I wouldn't worry about it. With Lapua, Bushing '286' is going to give you an OD of 0.286" regardless of whether the brass is old or new. Once loaded the OD will be .289" and that gives .003" of neck tension. If you want more then go tighter at #'285'.


.



.

[CJW]

Thanks Klem......