Loads.
We specialise in named boxlocks from England and Scotland
Starting around the £6-700 mark for Branded "trade guns" - tend to be Dickson, Martin, Fraser, Allan, Ingram, Dougall etc but built on Birmingham actions (usually Webley&Scott)
The geniune "built" named guns tend to be significantly finer with much more ornate and highcoverage engraving, ornate fences, sculpted actions/levers etc (Martin, Dougall, Ingram, Holland, Cogswell, Dickson, Denton, Holloway, Hellis, Henry, Harkom etc)
These run from High hundreds into low thousands
All usually 2 1/2" with 28-32" barrels, chokes vary massively from cyl/cyl through full/full and everything inbetween
Don't confuse "Nitro Proof" with "Can't use steel"
We carry four brands of standard performance, 2 1/2", steel cartridges for clay and game that can be used in ANY Nitro Prooved gun.
As an aside.....
We are about to prove the choke issue is a non issue with a test barrel covered in strain guages from breech to muzzle
I intend to demonstrate what I believe to be true
The pressure drop from breech to muzzle is significant - measured by Winchester in the 70s - and published in numerous other places thereafter
Winchester W-W lab data on three different 12 ga factory loads
- 0.36T - 700 psi @ 26"
- 0.27T - 620 psi @ 28"
- 0. 27T 605 psi @ 29".
Article in the (UK) The Journal of The Forensic Science Soc. - Auth. Victor Drake
Units Brit Long Ton (2240#/T) Radial Lead Crusher Method (One Long Ton per Square inch = 2,240 psi)
- Max 2.8T @1" from breech
- 2.5T @6" from breech (5600 psi)
- 0.5T @14" (1120 psi
- 0.25T@20" (560psi)
- 0.1T @30" (224psi)
Burrard The Modern Shotgun , Ch. Pressure
- 2.8T@1"
- 0.36T@20"
- 0.2 T@30"
The steel is travelling in a cup of plastic or "biowad" contruction usually at least 0.5-0.75mm thick - RADIALLY 1-1.5mm as a diameter measurement
The contriction of the bore to a full choke is 0.035" or 0.889mm
I am not convinced that the compression of relatively soft plastic/synthetic twce the thickness of the constriction of the choke of the is significant enough or restricts the repacking of the shot in the cup to drive muzzle pressures high enough with a full choke to be of structural concern
But we will see!!