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2 1/2" 12 gauge advice #14286589 11/16/19
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jfw042 Online Content OP
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Picked up a lovely little German hammer 12 gauge today, has short chambers - maybe 2 9/16? Have some books that show 2 1/2" load date but am looking for any advice or suggestions from those of you who have some experience building short shells. Thanks in advance

300 BP

Re: 2 1/2" 12 gauge advice [Re: jfw042] #14287010 11/17/19
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erich Offline
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I rarely shoot 2 3/4" loads any longer even in my 2 3/4" chambered shotguns. I have MEC 600' in 16 and 12 with short shell kits installed. There is quite a bit of info in Ballistic Products "Advantages" shotshell reloading manual. Keep your pressures low to ease the strain on these older shotguns. For waterfowl I load 3/4 oz of ITX 6's in my 16ga and 7/8 oz of ITX 6's and 1 oz of Bismuth in my 12's. I roll crimp my waterfowl/non-tox loads and fold crimp my lead loads 7/8-1oz of lead 5's make a great pheasant load in the 12's, 3/4 to 7/8oz in the 16ga and 1oz of NP BB's in the 16 for coyotes/predators

2 1/2" 16ga 1oz NP BB's
[Linked Image from imagizer.imageshack.com]

2 1/2" 12ga 1oz 6" (factory B&P High Pheasant 2 1/2")
[Linked Image from imagizer.imageshack.com]

2 1/2" 12ga 7/8oz ITX 6's
[Linked Image from imagizer.imageshack.com]


Last edited by erich; 11/17/19.

After the first shot the rest are just noise.

Heaven has walls and rules, H-ll has open borders
Re: 2 1/2" 12 gauge advice [Re: jfw042] #14293006 11/19/19
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jfw042 Online Content OP
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Thanks Erich, cut down some Remington trap hulls & loaded them with 7/8 oz 7 1/2's & a charge of International clays w/ a AA wad. Similar to a load found in the Advantages manual. Hope to get out & try them later in the week

Re: 2 1/2" 12 gauge advice [Re: jfw042] #14300803 11/21/19
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luv2safari Offline
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You might like these:

It saves time and effort, but erich has the technique dialed in. wink

https://rstshells.americommerce.com/store/p/110-12-Ga-2-1/2-Paper-Lite-Vel-1175-1-oz-Load-Box.aspx
https://rstshells.americommerce.com...er-Fibre-Wad-Vel-1225-1-oz-Load-Box.aspx


You will also do fine using 2 3/4" light to moderate loads in it. Get in touch with Mule Deer here about the myth of pressures and standard length shells in slightly shorter chambers.


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Re: 2 1/2" 12 gauge advice [Re: jfw042] #14301462 11/22/19
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erich Offline
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The problem is finding light to moderate 2 3/4" shotshells. Most modern 2 3/4" ammo be it light skeet loads or light field dove loads are designed to reliably operate modern semi autos so they are loaded fairly stout. Pressure does increase with a 2 3/4" shell in a short chamber it might not be as significant as thought in the past usually 1000 psi or less but when you are shooting ammo that is near max to begin with it can get into the significant range especially when your talking about a 100+ year old shotgun. I is hard to find pressure date from manufactures, the only one that I know that published it is P&G and their really nice 2 1/2"(65mm) High Pheasant loads are no longer imported.

Why risk anything with a fine old shotgun when you can easily feed it with the ammunition it was designed around.


After the first shot the rest are just noise.

Heaven has walls and rules, H-ll has open borders
Alpha

Re: 2 1/2" 12 gauge advice [Re: erich] #14315172 11/26/19
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erich,

Would like to hear where you obtained the info that pressure increases 1000 psi in 2-1/2" chambers.

The data I have is not just from older sources, but two electronic tests, one made by a major American ammo company.

Am not contesting what you say about higher pressures in older shotguns. Have owned and used many, some made before 1900. Just wondering about the source.


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Re: 2 1/2" 12 gauge advice [Re: jfw042] #14315312 11/26/19
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jfw042 Online Content OP
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Ordered & received a case of this - Gamebore 12ga 2.5 Pure Gold #7- from Ballistic Products but haven't had a chance to shoot any of them yet. Wind, snow, sleet, etc. Hope for next week.


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