Here’s one for you Big Bore fans…32 caliber Sheridan!
picked this one up awhile back
it was the first of a very small number of Sheridan pumpers converted by Perotti to .32
modded the valve some per Perotti’s suggestions
pulls mid 800 FPS range on .310 round balls!

Looks kinda stock at first glance except for the valve screws

Hmmm…cocking knob on a Sheridan?

.310 ball resting in breech forward on the custom bolt…note the splattered round ball sitting on the box
neat rig, too bad someone doesn’t get with the program and start offerring a custom .308 on the Sheridan platform
has the potential to be nearly as effective as the Corsair in a self contained platform.
need to do a bunch more mork to this one but considering it was a test platform it is surprisingly powerful
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Jerry:
tweaked it some with a press and a laser bore sighter…its not bad now but not near acceptable to my anal retentive id on certain things
too get it better would mean flowing the soldered joints and at that point I am better off changing out the barrel with a far better one that’s threaded at the front end, for…well you get the idea 😉
I agree, not much difference cracked out of the mold prior to being hit by the sizer
give you an extreme example
years back Klein’s of Chicago used to rechamber the .310 Martini Cadet to .32 Winchester Special. Padre had one that beat my shoulder black and blue but it was damned accurate. Similarly there were/are adapters to allow one to run .32 ACP thru .30 bores
add to that as you noted there can be a great deal of variance in pre, {actually even post} SAMMI specs
gets real crazy on 19th century shit where you actually need to slug the barrel and size to groove
learned that many years back building and shooting Trapdoor Springfields before I was even 14 years old.
Understand I tend to go off on tangents, it’s my nature
I have had a love affair with Big Bore AGs since the early to mid 70s
yeah many many years, years before even Dennis took an interest in them
much of what is now offered is really half assed in my not too humble opinion, actually much of what was available to the discriminating Noble of the 18th and more particularly the early to mid 19th century was in many ways far superior to todays Big Bore AGs
still own a small number of high grade english Big Bore AGs as well as a few projects including a frozen Girondoni action that came out of a barn in Queerbec back around 77′
not a nose picking new comer to this by any means
in fact there are a few items in the Beeman collection that originally passed through my greasy palms 😉
my parents basement still maintains the results of my first exploit with a new to me .40 air cane
a concrete block with a neat hole through one side of it…
Heck I even still own an orginal Casselman I saved and saved to buy back in the day when he advertised in the back of Soldier of Fortune
must have been like 1980 give or take…
anyways will be starting a new thread in a bit just fer walt on another very vintage project… 😆