20 VT Brass from Lapua .221

[Buckeye]

Anyone using Lapua brass in their 20vt ( from .221 lapua) If so...are you having to neck turn ? my reamer has .231 neck , and a loaded Lapua case is measuring .2305 . I haven't had to neck turn my Remington brass .

Any input would be greatly appreciated !

[Buckeye]

I'm going to have to equipt myself with a neck turner I guess , K&M ?

What all do I need to do this right ? seems to be a lot of variations out there . carbide , steel , cutting pilots .... what do I really need ?

[sgtg]

Take one of the fired cases out of THAT gun measure the neck Outside diameter , then make up a round with your Lapua brass measure it and see how much clearance you'll have before you turn any necks. sgtg

PS; Any brass that gets necked down can get thick enough to cause a neck clearance problem, so good on you for checking that. sgtg

[Buckeye]

Thanks for your input ....lots of knowledge on this site 👍. I think I'll give them a call tomorrow.

[Groundhog Devastation]

Save yourself time and trouble by using Norma or even necked up
Remington 17 Fireball brass. The Lapua brass will almost certainly need to. E turned to fit a lot of VarTarg chambers. My Cooper Phoenix has at its disposal over 750 resized 17Fireball brass and some 250 pieces of Norma brass. The Fireball brass was almost all fired as 17Fireball and in the "necking up" process I lost
8 pieces total. The Norma 221 just run it through the FL die and load be shoot. I really do not think turning Lapua brass is going to improve my rifle's accuracy. .0's and .1's and .2's work for me. I tried the Lapua brass and when I found out it would need neck turning I got rid of it.

[Buckeye]

I had heard they have a Lapua sized reamer .234 neck I believe? I was hoping I didn't prep this brass for resale !

[Gabe221]

I had my reamer made so I could use Lapua brass.

[ramos]

Love the K&M turning fixture. I use their expander w/riser, carbide turning mandrel and non-carbide cutter. As mentioned, good folks to deal with.

No reamers, here. Outside turning, in my own opinion, results in more uniform thickness throughout the entire neck.

Above is in reference to case neck reamers (doughnut cutters), not chamber reamers, obviously.

[Rick in Oregon]

Regardless if I'm using Norma/Nosler, Lapua or R-P brass for my 20VT, outside neck turning is mandatory to me. If nothing else, it trues up the neck thickness after forming, making axial alignment with the bore even more certain.

There's probably better neck turning rigs out there that the Forester trimmer with the neck turning attachment installed that I've been using now for over 35 years, but seeing as my Coopers are all shooting like GD's mentioned above, I see no need to change anything in the immediate future.

BTW, my .20 cal rifle chamber necks run from .232" to .234" in five rifles. A chamber cast done for me by Cooper on a 204R MTV mics exactly .234".

[sgtg]

Sorry didn't read the whole post. sgtg