A cartridge that is something different from the ordinary. Been around for awhile and is one of the best "Score" Target shooting cartridges in the world. Is also used for short / medium range hunting and packs a little surprise. It's "Group" Target shooting pal is the 6mmPPC.
Pictured are from left to right the .22BR, 6mmBR and 30BR cartridges.

It starts off life as a standard 6mmBR Lapua case and has it's neck expanded with a Mandrel in one pass to 30 Calibre. This creates rather a large "donut" on the outside of the case from where the neck / shoulder junction once was located and this must be removed by Neck Turning.
Before Neck Turning.

After neck turning.

The bullets loaded as shown are 118gr Copperhead "30 Calibre BR" and are around 0.990" in length, base to meplat (tip). They are Flat Base Target Bullets.
Barrels are specifically made for this short bullet and are typically 17 -18 Twist. The bullet range is typically 110-120gr and the Freebore / Lead is from Zero to 0.010" only. The most commonly used and preferred powder is H4198 (AR2207) at around 32.00gr charge weight. Yes, that's right AR2207, a fast powder. The tested velocity is around 2,950fps.
There is something really magic about this particular calibre beside it's ultra accuracy. It doesn't wear barrels nor stress cartridge cases. One of the foremost competition target shooters in the USA has fired around 8,000 rounds through one Kreiger Barrel and is still winning competitions with it. He initially formed 150 Lapua Cases and is still using the same batch after 50 odd reloads. Magic.....!!!!!
The concentricity of a newly formed case is terrible due to the way it's expanded to 30 Calibre. The shoulder area is not correct until it is Fire-Formed but is still very accurate.
Here's a photo of the first group shot at 175 metres in a brand new barrel and after only 5 shots to complete run in....ie copper fouling stopped. This is Fire-Forming Cases.

I only had 10 cases at that time so no load development has been done, the powder load was an educated guess. Primers used were Federal 205M and bullets were seated 0.002" off the lands. All this will change once I fire-form the remaining 90 cases.
Down to the Rifle. Just a modified .223R Remington 700 VSSF built by Shane Clancy, Narrandera. Bolt face opened out (Firing Pin Sleved), 2oz Jewell BR Trigger (bottom bolt release), Laminated Ply Stock, 26.5" Kreiger 5R Stainless Match Barrel, Ken Farrell 20MOA Rail (JB Weld Bedded) and a March 10-60x52mm Scope.
I didn't put this under "Projects" since it's not. The Rifle was purchased as a 6.5x47 Lapua already built with a new 30BR Barrel. This is about the calibre really not a rifle build.
The complete unit......enjoy....!!!
Pictured are from left to right the .22BR, 6mmBR and 30BR cartridges.

It starts off life as a standard 6mmBR Lapua case and has it's neck expanded with a Mandrel in one pass to 30 Calibre. This creates rather a large "donut" on the outside of the case from where the neck / shoulder junction once was located and this must be removed by Neck Turning.
Before Neck Turning.


After neck turning.


The bullets loaded as shown are 118gr Copperhead "30 Calibre BR" and are around 0.990" in length, base to meplat (tip). They are Flat Base Target Bullets.
Barrels are specifically made for this short bullet and are typically 17 -18 Twist. The bullet range is typically 110-120gr and the Freebore / Lead is from Zero to 0.010" only. The most commonly used and preferred powder is H4198 (AR2207) at around 32.00gr charge weight. Yes, that's right AR2207, a fast powder. The tested velocity is around 2,950fps.
There is something really magic about this particular calibre beside it's ultra accuracy. It doesn't wear barrels nor stress cartridge cases. One of the foremost competition target shooters in the USA has fired around 8,000 rounds through one Kreiger Barrel and is still winning competitions with it. He initially formed 150 Lapua Cases and is still using the same batch after 50 odd reloads. Magic.....!!!!!
The concentricity of a newly formed case is terrible due to the way it's expanded to 30 Calibre. The shoulder area is not correct until it is Fire-Formed but is still very accurate.
Here's a photo of the first group shot at 175 metres in a brand new barrel and after only 5 shots to complete run in....ie copper fouling stopped. This is Fire-Forming Cases.

I only had 10 cases at that time so no load development has been done, the powder load was an educated guess. Primers used were Federal 205M and bullets were seated 0.002" off the lands. All this will change once I fire-form the remaining 90 cases.
Down to the Rifle. Just a modified .223R Remington 700 VSSF built by Shane Clancy, Narrandera. Bolt face opened out (Firing Pin Sleved), 2oz Jewell BR Trigger (bottom bolt release), Laminated Ply Stock, 26.5" Kreiger 5R Stainless Match Barrel, Ken Farrell 20MOA Rail (JB Weld Bedded) and a March 10-60x52mm Scope.
I didn't put this under "Projects" since it's not. The Rifle was purchased as a 6.5x47 Lapua already built with a new 30BR Barrel. This is about the calibre really not a rifle build.
The complete unit......enjoy....!!!

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