12G Grouse Extreme

12G Grouse Extreme Shotgun Cartridge

High performance 12 bore shotgun cartridges for grouse

Building on the legendary performance of our award winning Black Gold, with over two year's development, Gamebore Grouse Extreme delivers the ultimate performance on this most testing of game birds. Using our unique and exclusive Diamond Shot and Quad Seal, and powered by RS propellant, these cartridges are smooth, easy on the shoulder and effective beyond words.

High velocity for extended range

High performance cartridges deliver a velocity of 1450 feet per second. Ideal for demanding targets at range. 12G Grouse Extreme downrange energy is key to their long range effectiveness. These cartridges are designed to deliver unsurpassed knockdown performance.

100% plastic free fibre wads

Gamebore uses the highest quality, single piece, non fragmenting 100% fibre wads to deliver excellent gas seals for maximum pressure and outstanding patterns and a more sustainable shoot.

All cartridges should be stored at room temperature in a dry location. Adverse temperatures may affect performance. Do not expose to extreme temperatures.

Diamond Shot Sizes

5.5 2.75mm
6 2.6mm
Devastating
Knockout
Power

Quad Seal

Exclusive 4 Ring Gas Seal

4

Diamond Shot

Our precision shot produced here at Gamebore - Graded 5 times

5x

Velocity

High performance with a velocity of 1450 feet per second

1450fps

Technology

Quad Seal

Quad Seal

The exclusive Quad Seal. Delivering a level of ballistic consistency not previously achievable thanks to its revolutionary four-ring design. The Quad Seal reduces recoil, increases striking energy and is 100% environmentally friendly being fully degradable.

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Diamond Shot

Diamond Shot

Our precision lead shot is exclusive to Gamebore and produced in-house at the only working shot tower in the UK. Lead shot taken to the next level with this unique process-5x graded, then polished in a revolutionary method to produce shot of a consistency far beyond anything else available. Perfect in its sphericity and accurate, even size to deliver the ultimate in patterns. Simply put, Diamond Shot® is the highest quality lead shot in the world.

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RS Propellant

RS Propellant

Our custom blended, top of the range double base RS propellant gives the highest performance possible, whilst remaining comfortable for the shooter.

CX2000 Primer

CX2000 Primer

The most highly consistent and reliable primer available. We use CX2000 Primer throughout our range of shotgun cartridges to give the shooter the utmost reliability and confidence.

Nickel Head

Nickel Head

Nickel plated heads to give smooth, consistent and reliable ejection in higher performance loads.

Fibre Wad

Fibre Wad

The highest quality, single piece, non fragmenting 100% fibre wads with no plastic components. Delivering excellent gas seals and patterns for a reliable environmentally friendly shoot.

HD 11

HD 11

Shot with a High density of 11.0gram/cm3

Extended Range

Extended Range

Muzzle velocity is only part of the story - downrange energy is key to a cartridge's long range effectiveness. These cartridges are designed to deliver unsurpassed performance downrange where it matters most, giving knockdown performance others simply cannot match.

Ultimate Performance

Ultimate Performance

Developed to ensure each component combines to give their maximum potential and deliver results which are greater than the sum of their parts - simply the cutting edge of performance cartridges.

Technical performance
Velocity x Distance

The following graph shows the relationship between Velocity (MPS) and Distance (M) for the shot selected from the table below.

Load gms Shot Size WAD Length mm Muzzle Velocity FPS Velocity MPS V1
29 5.5, 6 Fibre QS 12/65 1450 422
31 5.5, 6 Fibre QS 12/65 1450 422
33 5.5 Fibre QS 20/70 1450 422

Designed & Developed by Gamebore for Gamebore

How the Quad Seal Works

Designed and developed by our R&D division, the unique four-ring design of the Quad Seal gives four times the sealing area of a conventional plastic wad, retaining energy and giving improved performance with a smoother shoot.

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