New to neck turning

[monkeymt]

I am sure that this topic has been covered here before but after searching lots of posts I can not find the answer to my question.
I have 22BR that I just got a few weeks ago and love it. I want to start loading with some new Lapua brass and keep finding recommendations for turning the necks. First of all which tools would I begin with?
The necks on the brass that came with the gun,7BR Remington) measure 2.42 and the Lapua brass after I resized it in a Forster full length die measures 2.50. I see that RCBS makes an outside neck turner for a reasonable price and Sinclair goes up quite a bit from there.
This gun is custom built back in 2000 or 2001. I have reloaded ammo with 55gr Nosler orange ballistic tip bullets, 34 gr BLC-2, Remington primers that, I am not kidding you have shot 5 shot groups at 5/8' at 100 yards. It has a home made harmonic balancer and a Douglas barrel on a Remington BDL action,mid 70's vintage) and original stock which has been bedded and a trigger that is very crisp at 12 ounces.
Thank you for reading this post from a first time wildcat user.
Mark

 

[TonyR]

This article was very helpful when I started out.

http://www.6mmbr.com/jgcaseprep.html

 

[monkeymt]

Thanks Tony, that article is just what I was looking for.
I did make a mistake in my original post, I should have said the reloaded Remington brass neck measured .242 and the sized Lapua measured .250. It would appear that I need to turn the necks down a bit.