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2 1/2" shells


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Yep your right, there are quite a few around. Just done some research and the majority of game shells are 2 1/2" i always assumed that they were 2 3/4" as thats what most mordern guns are chambered too. :blink:

 

It's this new fangled Metric system! It's time they realised it just wont work! You know where you are with 6 pennies in a shilling, four crowns in a farthing and 12 hogs heads in a ream........etc,etc :good:

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For many years, (since 1983) the only TRUE 2.1/2" (65mm) was loaded and still is loaded by LYALVALE.

 

Eley Grand Prix were loaded in 2.3/4" (70mm) cases for tens of years and classed as 'safe' for use in 2.1/2" chambers! It was not until the 1970s that Eley started using imported 67mm cases and these are NOT true 2.1/2" cases.

 

Recent times have seen HULL using black Cheddite 65mm cases. I think most producers will resort to using 67mm cases soon - think about it! Rising cost of plastic - shorter case, shorter wad - less plastic!

 

Lyalvale is your best bet for TRUE 2.1/2" shells. ('High Velocity' 28g and the fantastic SUPREME GAME 30/32gram - amongst others.)

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Yep your right, there are quite a few around. Just done some research and the majority of game shells are 2 1/2" i always assumed that they were 2 3/4" as thats what most mordern guns are chambered too. :good:

 

It's this new fangled Metric system! It's time they realised it just wont work! You know where you are with 6 pennies in a shilling, four crowns in a farthing and 12 hogs heads in a ream........etc,etc :lol:

I'm sure that you have that wrong, it's 12 hogsheads to a quart.......or was that a dram....?

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Caledonian Cartridges in Inverness make the "monarch" 29g fibre load in a true 2 1/2" case.

 

Remember, its the length of the case AFTER firing, not the crimped shell, so a 2 1/2" paper case with a rolled edge is longer unfired than a plastic crimped shell.

 

Also, a cartridge may be rated on its actual length, or its pressure rating - so a 2 1/2 inch magnum exists. This means , although the physical cartridge measures 2 1/2" open, it must be fired from a magnum (3") chamber, as this short cartridge has modern high power powders that produce the higher pressures only 3" chambers are designed for.

 

In essence, its not what the unfired shell measures, its what it says on the box, and that can be related to either the true open cartridge length OR the pressure rating regardless of the fired length.

 

Clayman

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  • 2 years later...

Hello, mate.

One could ask what have you been using for the past 2 years or so.

All the info you've been given is good and if the truth be known, most of us aren't quite sure about where the 67mm came from either. You're delving in to the black arts here and probably the only easy way to get the info is to book an appointment for a visit to the proof house and ask some pertinent questions.

Guessing here (can be fatal), but with 2.5" chambers, there's a good chance you have an older gun and in which case it may just have the maximum working pressure and/or the maximum load annotated along with the other proof marks.

Cheers

Edited by wymberley
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