Can't be answered without knowing who made it.
1 in 16" From the Speer #11 Reloading Manual.
four
http://www.gunpartscorp.com/Products/198420D.htm
%rate= (425/340) x100% = 125%
$250 - $300
% rate= (119/340) x 100% = 35%
Depends on which model. We carry magazines for the 340 series in .22 Hornet, and can get magazines for the older models. www.countrygunsmith.net Try Numrich gun parts http://www.egunparts.com
Without a serial number,I can only say that the savage model 340 was made from 1950-1985.If you would include the type of sights,barrel,barrel length,and stock design It would better help me in deciding with in which years your savage model 340 was produced.
% rate = 340%= 34/10 * 100%= 34 * 10%= 340%
% rate:= 3.40 * 100%= 340%
340 is 39.6% of 859
100-340 USD