Belted

Here is the link

www.kynochammunition.co.uk

They make snap caps in all N.E calibres to .600 NE including both the 450/400 3 1/4" and 3" (the 2 are not the same as the 3 inch case is a different rim dimension) drop them an e-mail with your request and if they have them in stock, which they usually do, a credit card or debit card order will se a pair sent to you the same day and you should havew them in 7-10 days.

hope this helps

Regards

Jonathan