SilverBore Posted August 9, 2008 Report Share Posted August 9, 2008 Apologies for asking what may seem like a stupid question, but I'd rather ask than try it and regret it! I have a Bettinsoli Diamond X 30" M/C with a 3" chamber (first gun), the specs say it can take cartridges that are 2 3/4" (70mm) & 3" (75mm) but I have some 21g Hull Comp X that are only 2 1/2" (65mm). Are these ok for the Bettinsoli? Is the general rule of thumb, it's ok to use cartridges that are less than or equal to the chamber length but not greater? Will there be any difference to how the smaller cartridges work in a larger chamber? Or should you always match chamber length and cartridge exactly? Ta Quote Link to comment Share on other sites More sharing options...
Ferret Master Posted August 9, 2008 Report Share Posted August 9, 2008 They will be fine. FM Quote Link to comment Share on other sites More sharing options...
andrewluke Posted August 9, 2008 Report Share Posted August 9, 2008 if chamber is 3" any cartridge 3" or shorter is ok as i think the bettinsoli is proofed for high performance steel. andrew Quote Link to comment Share on other sites More sharing options...
clayman Posted August 11, 2008 Report Share Posted August 11, 2008 Chamber length is for the maximum length and load, shorter and lighter are always OK. Remember, its the measure of the fired and open case that counts in the chamber, NOT the crimped, unfired length. Quote Link to comment Share on other sites More sharing options...
Maiden22 Posted August 11, 2008 Report Share Posted August 11, 2008 Shorter or equal fine, longer don't be anywhere near it when it goes off. Robert Quote Link to comment Share on other sites More sharing options...
bob300w Posted August 11, 2008 Report Share Posted August 11, 2008 Don't go by the length of the cartridge, fired or unfired. Go by what is printed on the cartridge or the box. If you are unsure don't use them. If they have a dimension greater than 75mm printed on them, they are unsafe in your gun. Anything printed with 75mm or under is OK. Quote Link to comment Share on other sites More sharing options...
mattslaptop247 Posted August 11, 2008 Report Share Posted August 11, 2008 right then guys, i have some cartridges 67mm printed on them, are they ok in a 65mm (2 1/2") chamber. I would think not but my gunsmithsays they should be fine Quote Link to comment Share on other sites More sharing options...
Graham M Posted August 11, 2008 Report Share Posted August 11, 2008 If the gun is marked 3 tons then it will be OK. G.M. Quote Link to comment Share on other sites More sharing options...
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