I LOVE Browning Shotguns!
I've got a late 50's A-5 (27.5" bbl, Modified Choke, Ventilated Rib, with the Round Knob & Long Tang). I purchased it back in the mid 90's in unfired condition and have since put through thousands and thousands of Shot Shells.

Never had a hic-cup!!
A-5 HINTS:
After you clean the Shotgun, completely wipe off any Solvent from he outside of the Magazine Tube and Friction Rings. Use ONLY straight 30 weight NON DETERGENT Motor Oil to lightly lubricate the outside of the Mag Tube before reassembling. Make SURE it's Non Detergent! The 30 weight Oil is perfect for the recoil operated action and will lube and assure the Bolt does not come rearward too fast as a very slippery and thin lube will. Most failures to eject, or re-load a fresh Shell are directly caused by improper lubrication of these seldom understood Auto 5's. Don't use this motor oil on anything else other than the outside of the Mag Tube and don't slather it on - just a very light coating works best.
Make SURE your Friction Rings are set to the loads you are shooting. If not set properly, light target loads might not eject or when shooting heavy loads your shoulder will get beat up. The diagram should be glued onto the inside of the For-end and if not you can print one from on-line and glue it in.
I'd definitely recommend the use of Tipton Snap Caps to release the Firing Pin when storing. I find that brand to be the best.
BTW - do NOT use Steel Shot in your vintage A-5 as you WILL damage the fixed Choke Barrel! The Browning A-5 was NEVER made for Steel and the Barrel will bulge if Steel is used. If you need to fire Steel for shooting over water - get a modern Barrel for the A-5 that is made for Steel. Barrels swap out in seconds.
Follow these simple hints and you should get thousands and thousands of trouble free shots. I've completely lost count on just how many thousands of shells I've put through mine, but it is definitely the most fired Shotgun I own - only second to my Browning Grade 2 Superposed. I shoot the Superposed just as much, but it only holds 2 Shells instead of 5.
