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
Knockout
Power
Quad Seal
Exclusive 4 Ring Gas Seal
4Diamond Shot
Our precision shot produced here at Gamebore - Graded 5 times
5xVelocity
High performance with a velocity of 1450 feet per second
1450fpsTechnology
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
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
Our custom blended, top of the range double base RS propellant gives the highest performance possible, whilst remaining comfortable for the shooter.
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 plated heads to give smooth, consistent and reliable ejection in higher performance loads.
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
Shot with a High density of 11.0gram/cm3
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
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.
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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