Mossberg 935 and slugs

[yotehunter]

I just bought a new 935 and I was wondering how slugs would work in the overbored barrel that the 935 has. My plans are to hunt Black Bear next fall.
I am installing a Burris shotgun scope. My shots should be no further than 25 yards. My biggest concern is the overbored barrel and if rifled choke tubes are available for them.

 

[mons meg]

Since it's basically a gas version of the 835, I would think you would want to go with the slug barrel. Anyone out there with an 835 care to comment?

 

[arcticap]

At 25 yards, I can't see any reason to worry about the overboring causing a problem, unless you happen to find out otherwise. I can remember shooting 20 ga. 2¾" Rottweil Magnum Brenneke slugs through an NEF single shot with a modified choke out to 50 yards open sighted decently enough. I think the bore would be more important than the backbore...

 

[WhiteKnight]

I don't understand why backboring would cause any kind of problem. Could someone please enlighten me?

 

[Dave McCracken]

Some slugs fail to obturate(fill the bore and seal the gases in) in overbored barrels. Safe enough but velocity drops and accuracy goes to a warm place in a handbasket.

Does that help?

 

[WhiteKnight]

Gotcha.

Would the overboring be significant enough that the slug could actually careen back and forth (sort of like an out-of-control car hitting the guiderails) inside the barrel after it's been fired?

 

[arcticap]

Proper choke selection?

I didn't realize the extent of the overboring of Mossberg 935 shotguns which is stated on the Mossberg website as follows:
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935 Overbore (.775) vs. Standard 12 gauge bore (.731)
For superior pattern performance and reduced felt recoil, each smooth bore 935 barrel (left) is "overbored" to 10 gauge dimensions.


Choke tubes for 935MAGNUM™ autoloader barrels and the 835® ULTI-MAG® pump-action shotgun barrels are interchangeable.
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The fact that the Browning Invector Plus backbored barrels have a rifled choke tube available with rifling measuring .730 might indicate that if the proper Mossberg 835/935 choke was selected and test fired at the close 25 yard range, it may very well produce satisfactory accuracy. If one visits www.choketube.com (Carlson's choke tubes) and investigates the interchangable 835/935 choke dimensions, an IMPROVED MODIFIED choke tube tube measuring .735 is available as well as a .743 MODIFIED (and other larger sizes) which may approximate the proportional bore to choke dimensions enough to justify test firing for accuracy. While there may be some "chatter" as the slug passes through the barrel, the choke tube constriction might prove to be adequately beneficial enough to fulfill the intended purpose of slugging the bear. I would encourage yotehunter to ask the people at Carlson's or any other choke tube company for their expert advice as it may be a common question. Hopefully, testing will "bear fruit"!

 

[BoomStick82]

I hate to bring up a very old thread, but I was reading the manual for the 500/835/590 the other day and it states that slugs should not be used in the 835. So I looked up the 935 manual and it also says "Slugs: Overbored 935(tm) Accu-Mag(tm) barrels are designed for lead, steel and other non-toxic shot loads only. We specifically disclaim any responsibility for damage or injury resulting from firing slugs (single projectile ammunition) through overbored barrels. Use only non-overbored 935(tm) barrels designed specifically for slug shooting." (page 22).