6.5 X 55
I have heard of other European 6.5mm's, especially the Italian Carcano, that slug as high as .269" or .270". I will take your advise and slug the barrel.
I made an error in the spelling of Husqvarna but made an even bigger error describing my Swede. It is a Carl Gustav and not a Husqvarna. I have another Swedish mauser that is an unaltered Husqvarna. I should have looked at the receiver ring before initating this post.
Get your 4 year old one of the little (tiny) youth .22's like the Henry and take him/her to the range with you. I have two girls (no boys) that I started out shooting when they were 5 years old. The younger daughter took to it like a duck takes to water. She is now 30 years old and can outhunt and outshoot most men, especially on the sporting clays range. The other daughter, age 33, does not care for hunting but handles her Glock 23 pretty darn good.
Sorry I got a little off the subject. Now I am going to open my tackel box and see if I can find some .270"-.280" lead sinkers, some lithium grease and slug the barrel.