Comments on: Whitley Creates Accurate 6mm Cartridge with 22-250 Lapua Brass

By: Robert Clark

Robert Clark — Mon, 20 May 2019 20:07:38 +0000

I have a Fred Sinclair 6×250 with a 270 neck sitting on a Sako L579 receiver. I have learned how to create the shells from Nora brass thinning the neck to fit the 270 neck. To my understanding there are a few of these exact riffles that were made in the 70s by Fred Sinclair & his apprinteses. Ive been told that one of Mr. Sinclairs apprinteses to this day still does long range competition with this exact same riffle. I’m looking for bullet and powder loads for the best accuracy. I believe my Barrel is an 11 & 1 twist. I know that’s odd but doing the tape on a gun cleaning Rod that is what I ended up with. Would appreciate someone’s help to be able to create really good varmint and possibly deer bullets or long distance shooting bullets for this riffle. Thank you

By: Ranger1177

Ranger1177 — Tue, 07 Oct 2014 17:51:41 +0000

This cartridge should make an outstanding varmint/predator hunting rifle. With the exception of utilizing a shorter freebore for lighter varmint bullets (65-87 gr.) with a 1-12 twist barrel. I belive Robert Whitley has come up with a most excellent cartridge design which is easy to make and should give long case and barrel life and excellent accuracy. Kudos to Robert on this cartridge design. It will probley be my next long range varmint rifle.

By: Robert Whitley

Robert Whitley — Wed, 05 May 2010 01:16:01 +0000

Wow that posting of Rick Curtis is bizarre! A 56 year out of shape guy with bad eyesight (me) takes a new wildcat and with fire forming loads with almost no load work up in a Remington 700 magazine feed high power match rifle, in prone with a sling shoots a perfect 10x clean (actually I shot 2 in a row with it for a 200/20x but the second group was slightly looser due to more pulse and body movement) and Rick says the new wildcat’s a loser to a 6mm BRX – New one on me!

Robert Whitley

By: Jim Hardy

Jim Hardy — Tue, 04 May 2010 04:48:22 +0000

Tanner:

I just wanted to explain who Rick is to the BR community as some on this board may not have heard of him. He is an exceptional prone/sling rifleman on an International level.

Of course, Robert is a regular contributor to this board, and he needs no introduction as a rifleman or cartridge tester.

And you are correct, the cartridge described may not be new at all, but thanks to Robert for bringing attention to this fine old wildcat. It sure got my attention, and I have a barrel in the safe that may like it.

I remember when a few competitors used to shoot this version of the .243 in 1000 yd BR at Hawks Ridge (as an alternative to the 243 AI), and they did very well indeed.

In fact, it seems like all of the chamberings based on the original 6BR and the 243 have done very well. Robert has made some other twists to the basic 243 which may be even better.

Favor center,
Jim Hardy

By: Tanner

Tanner — Tue, 04 May 2010 02:32:48 +0000

Sorry if I offended anyone with my lack of tact! I just got excited cause’ all I seen was criticism of the efforts of a fellow long range shooter trying/experimenting, I thought that was what this was what our sport was all about? I sure don’t have the track record as some of you guys, but maybe your constructive criticism may help, if its directed in a helpful way.

By: Jim Hardy

Jim Hardy — Tue, 04 May 2010 00:47:05 +0000

With all due respect to everyone, Rick Curtis is one of the very best prone shots in the USA. He shot a 1600 clean within a moth of taking up smallbore prone. He is is a Distinguished Rifleman in smallbore, and a High Master in Long Range.

Robert is a fine long range rifleman, and so am I on a given occasion. But, we are not even in the same league with the prone knots that Rick Curtis can lay down. Having said that, Robert’s prone group is a mighty fine one.

Jim Hardy

By: Editor

Editor — Mon, 03 May 2010 21:24:49 +0000

Rick–

I’m also a fan of the 6 BRX, but Robert is looking for a highpower cartridge that can feed well from a magazine. As far as accuracy goes, Robert typically tests the way he shoots matches — prone (no rest), with iron sights. I don’t know if he was using irons here.

By: Tanner

Tanner — Mon, 03 May 2010 08:12:34 +0000

The article states that 10 shot group was shot prone, that more than likely means with a sling. How could you complain about that kind of accuracy? Man!

This cartridge isn’t very original, but it is a good design for high power guys. I don’t think he’s trying to set the world on fire with his brand of cartridges but just tweak existing ones that suit for what highpower guys need. Lapua brass should hold up great too.

By: Rick Curtis

Rick Curtis — Sun, 02 May 2010 22:54:53 +0000

When it comes to the 6mm cartridge, the BRX is head and shoulders above everything else. It provides the perfect combustion chamber for the 105-108 bullet weight and does it so efficiently that you never need to clean the primer pockets. Plus, and no offense meant here but if my BRX shot a group like that I would be trying to figure out what was wrong.

By: Greg Verner

Greg Verner — Sun, 02 May 2010 19:29:35 +0000

I’m rather new at this, but I couldn’t help but wonder why not use .243 brass?