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· Silver Bullet member
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My Gun Digest Book of Shotgun Gunsmithing, 1983, has an article on Modernizing the Older Sixteen. It has the full A5 conversion process.

It does not include "setting the barrel forward"
Beyond reaming the chamber (it must be smooth, polished, not rough) you should:
grind a slope on the open end of the barrel extension so the fired shell doesn't hang up
replace the fixed ejector with a sliding type by opening up the ejector recess - Browning may have conversion type ejectors, modern "Sweet 16" ones wont fit.
lengthen the ejector port
take 3/32 in. off the inner rear section of the breech bolt/ action spring link
cut the rear shoulder of the shell carrier back 1/16 in for the longer shell, maintaining its original lines
cut the front of the shell stop back by 3/32 in.
cut the forward ledge inside the wooden forearm forward by 3/32 in. - you have to make a tool from a piece of pipe for this.
replace the recoil spring with a modern one if the old one is too weak

And first try it with a heavy recoil setting. Make sure the magazine tube is smooth and DO NOT OVER OIL

A lot of conversions ignored some or most of the provisions for functioning with longer shells and they may work at first, most of the time, but will break down.
 

· Silver Bullet member
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36,347 Posts
You really need the full Gun Digest Shotgun gunsmithing article. used online booksellers should have it pretty cheap.
 

· Silver Bullet member
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