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 Post subject: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Fri Apr 03, 2020 4:59 pm 
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Joined: Sun Nov 26, 2006 10:46 pm
Posts: 78
Location: Ellensburg, Washington
OK, hear me out on this. I know the 935 was developed to only cycle 3 and 3 1/2 inch shells. But I'd like to shoot some clays with it and it would be nice to have it cycle 2 3/4 inch shells so I could put 2-3 rounds in it for multiple clays.

Would it be possible (or advisable) to get a spring from a 930 and put that in my 935? Would that work? Has anyone done that?

Any other hacks to make a 935 cycle the shorter stuff?

I'm corona quarantined, but my gun range (private club) is still open to members, so I'm going shooting more now than ever before!

Thanks in advance for any thoughts.

Mad Mac




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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Sat Apr 04, 2020 6:51 pm 
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Joined: Sun Nov 26, 2006 10:46 pm
Posts: 78
Location: Ellensburg, Washington
72 views and no replies? Come on community, you can step up and give some advice! :lol:


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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Sat Apr 04, 2020 7:36 pm 
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https://www.mossberg.com/category/series/935-magnum/

"The 935 Magnum will shoot 2¾” heavy hunting loads as well as 3” and 3½” shells providing tremendous flexibility for hunters."

2-3/4 inch loads aren't a problem-- if they are heavy / fast enough. For trap singles, you're fine as is with most anything.

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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Sat Apr 04, 2020 9:57 pm 
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Joined: Sun Nov 26, 2006 10:46 pm
Posts: 78
Location: Ellensburg, Washington
Thanks Randy!

How 'heavy' do these loads need to be? Asking for a friend.... :)


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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Sat Apr 04, 2020 10:08 pm 
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With your gun, there is one way to find out.

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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Sat Apr 04, 2020 10:27 pm 
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Mad Mac wrote:
... I know the 935 was developed to only cycle 3 and 3 1/2 inch shells...

I was all set to embarrass myself by showing you a picture of a 935 barrel marked with "CHAMBERED FOR 2 3/4, 3 & 3 1/2 IN. SHELLS" (and I did), when I also discovered 935 barrels marked "CHAMBERED FOR 3 & 3 1/2 IN. SHELLS" (also shown).

I have no idea why some 935 barrels do not mention "chambered for 2-3/4 inch shells" but at least I now understand your claim, which is incorrect, as it turns out. From the Mossberg website, "The 935 Magnum will shoot 2¾” heavy hunting loads as well as 3” and 3½” shells providing tremendous flexibility for hunters."

Walmart economy target shells probably will not cycle your 935, but you can experiment with these affordable loads and others for clays. I used the ableammo website because I could select check boxes for 1-1/8 oz and 1-1/4 oz loads, for velocity (fps), for Federal as manufacturer, and for low to high price. IMO a minimum muzzle velocity of about 1250 fps is more pertinent than the weight of the shot. Good luck, sir.

Federal Premium Game-Shok Heavy Field Shotshells H12375, 12 Gauge, 2-3/4", 1-1/8 oz, 1255 fps, #7.5 Lead Shot, 25 Rounds/Box for $8.70 ($0.35/shell) or $82.60/flat ($0.33/shell).

Federal Premium Game-Shok Heavy Field Shotshells H1238, 12 Gauge, 2-3/4", 1-1/8 oz, 1255 fps, #8 Lead Shot, 25 Rounds/Box for $8.70 ($0.35/shell) or $82.60/flat ($0.33/shell).

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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Sun Apr 05, 2020 9:09 am 
Field Grade

Joined: Sun Nov 26, 2006 10:46 pm
Posts: 78
Location: Ellensburg, Washington
Thanks for the feedback, guys.

When I bought my 935 a long, long time ago, the word was that while it was chambered for 2 3/4 it would not cycle anything you'd use for clays. My barrel is definitely not labeled for 2 3/4. I'll try some 'heavier' loads as you suggest. Hopefully it works out.

Thanks again for the feedback, guys. I really appreciate it!

Mad Mac


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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Sun Apr 05, 2020 1:04 pm 
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Mad Mac wrote:
72 views and no replies? Come on community, you can step up and give some advice! :lol:


Have you tried it with common 1330 fps 1-1/4 oz. loads? If you're bored with your SA-20, you'll find out right quick.

Anyway, for trap singles, it doesn't need to cycle, so for rare / casual use . . . there is no problem.

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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Wed Apr 08, 2020 3:55 pm 
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I found two even more affordable 935 loads for clays, sir.

Federal Field & Range Shotshells FRL12NBS8, 12 Gauge, 2-3/4 in, 1 oz, 1290 fps, #8 Shot, 25 Rounds/Box, $5.99

Federal Top Gun Sporting Shotshells TGS12878, 12 Gauge, 2-3/4", 1 oz, 1250 fps, #8 Lead Shot, 25 Rounds/Box, $6.50

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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Thu Apr 30, 2020 10:43 am 
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Joined: Sat Apr 18, 2020 7:03 am
Posts: 28
Sorry I can't help any. Just looked at my 935 and it is the turkey/waterfowl MONBU camo combo and says 3 & 3 1/2 only on both barrels. I have used 2 3/4" shells in it and even the heavy loads cycled maybe once or twice out of an entire box. I doubt the 930 spring will have any bearing on the cycling unless there is even enough pressure to send the block back with enough force in the first place. Might be a good time to look for a dedicated trap/skeet gun?????


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 Post subject: Re: How to get my 935 to cycle 2 3/4 inch shells
PostPosted: Fri May 01, 2020 7:11 pm 
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wfb18 wrote:
IMO a minimum muzzle velocity of about 1250 fps is more pertinent than the weight of the shot.

Note to self: If that is what you think, then you have another think coming!

We could ask Mossberg what is the lowest level of kinetic energy that must be generated by a 12 gauge cartridge to fully cycle the 935 action. Or we could guesstimate, where Velocity x Velocity x Weight in grains / 450240 = Kinetic Energy, or KE = V x V x W / 450240.

Let's stipulate that a 2-3/4" heavy hunting load is 1330 fps and 1-1/4 oz. Then KE = 1330 x 1330 x 546.9 / 450240 = 2148.66 foot pounds. The 2-3/4" load that you choose for clays may have less kinetic energy, but some calculations can narrow your choices before you "buy to try".

Let's first compare the four loads that I suggested.

Federal Premium Game-Shok Heavy Field Shotshells H12375, 12 Gauge, 2-3/4", 1-1/8 oz, 1255 fps, #7.5 Lead Shot, 25 Rounds/Box for $8.70 ($0.35/shell) or $82.60/flat ($0.33/shell). KE = 1255 x 1255 x 492.19 / 450240 = 1721.77 foot pounds.

Federal Premium Game-Shok Heavy Field Shotshells H1238, 12 Gauge, 2-3/4", 1-1/8 oz, 1255 fps, #8 Lead Shot, 25 Rounds/Box for $8.70 ($0.35/shell) or $82.60/flat ($0.33/shell). KE = 1255 x 1255 x 492.19 / 450240 = 1721.77 foot pounds.

Federal Field & Range Shotshells FRL12NBS8, 12 Gauge, 2-3/4 in, 1 oz, 1290 fps, #8 Shot, 25 Rounds/Box, $5.99. KE = 1290 x 1290 x 437.50 / 450240 = 1617.01 foot pounds.

Federal Top Gun Sporting Shotshells TGS12878, 12 Gauge, 2-3/4", 1 oz, 1250 fps, #8 Lead Shot, 25 Rounds/Box, $6.50. KE = 1250 x 1250 x 437.50 / 450240 = 1518.29 foot pounds.

Those four loads may not have enough kinetic energy, although you can try them. Now let's look for some affordable #8 loads that approach KE = 2148.66 foot pounds, regardless of shell length.

I used the ableammo website check boxes to select 12 gauge #8 shot for any manufacturer, for any shell length, and then for low to high price. I eyeballed candidates for velocity, and the first two jumped out.

Rio Live Bird Royal Pigeon Loads C/D Shotshells RPCD368, 12 Gauge, 2-3/4", 1-1/4 oz, 1250 fps, #8 Shot, 10 Rounds/Box for $3.49 ($0.35/shell) or $87.00/flat ($0.35/shell). KE = 1250 x 1250 x 546.9 / 450240 = 1897.95 foot pounds. Best price, possibly insufficient kinetic energy, worth a try!

Rio Live Bird/ZZ/Helice Loads Royal Pigeon L/D Shotshells RPLD368, 12 Gauge, 2-3/4", 1-1/4 oz, 1330 fps, #8, 10 Rounds/Box for $3.99 ($0.40/shell) or $95.00/flat ($0.38/shell). KE = 1330 x 1330 x 546.9 / 450240 = 2148.66 foot pounds. Perfect kinetic energy, great price!

Good luck, Mad Mac.



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Joe and Jill
Went up the Hill
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Joe fell down
And lost his Crown,
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