You can check the manufacturer's website. Many manufcturers - and more all the time - have a link to download owners manuals for their products.
43.6818
If you know the manufacturer you might be able to find a copy of the manual online.
19 and 22/100, or as a proper fraction, 1922/100 = 961/50.
If you don't have a manual, find a gunsmith and ask for help.
If you don't have a manual, find a good gunsmith.
Try e-gunparts.com
You should use the users manual to help out with this. If that does not work, you can go online to find the manual there as well.
If you don't have an owner's manual, find a gunsmith and ask for help
Contact Remington and ask for a manual or find a gunsmith and ask for help
The "manual" for a Mossbery 146B(a) consists of a one page sheet, which is in the link below.
As of Aug, 2009, you can find the manual for it here: pdf.textfiles.com/manuals/FIREARMS/jchiggins_88.pdf
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