And you guys only thought I was only obsessed with moonclips. Back before I moved to the south I grew up hunting in Ohio and when I discovered 410 slugs were legal for deer in Ohio (an about half the states of the union) and when Winchester came out with the Winchester 9410 I went to great length to find the best 410 slug and for several years hunted nearly everything with that 410 shotgun. I had a short lived website that focused on my research on 410 slugs but I took it down a few years ago. (now defunct and the domain owned by someone else:
www.mcb-homis.com).
I could (did) write pages but I won't here if I can help it. If there is something specific I can go into details I still have the contents of my web page saved locally.
My 410 slug guns.
Top: Steven 38B 3-inch 410. It is the ugliest and cheapest gun I own, someone's newbie wood burning project I bough off the used gun rack at Gander Mountain ($85) I bought it to make a slug gun out of it. I cut about 2-inches off the length of the barrel to remove the full choke and crowned it more like a rifle. I made sight bases for it and use some Truglo ghost rings sights on it.
Bottom: Winchester 9410 2.5-inch 410, the 2002 version with the ugly cross bolt safety and fixed choke. The most fun shotgun I own. The choke was unusually as it measures cylinder bore but has a wad retardant etched ring near the muzzle and with the right shot ammo (Win AA target loads 8.5 shot was a good one) will pattern improved cylinder or slightly tighter. But the cylinder bore works really well with slugs.
My current collection of 410 ammo. Most of which is 410 slugs of one variety or another. I did a lot of reloading of 410 slugs too, using an old open source internal ballistic program called Numerical Advanced Internal Ballistic Model (NABM) to work up loads from scratch since there is vanishing little reloading data for 410 slugs, especially back when I was doing it. Ballistic Products now has a small set of data if you're looking.
The Brenneke Silver Slugs where always the best performers from a terminal point of view. They were the heaviest at 114 gr and were made of a fairly hard lead alloy. When I first started hunting with my Win 9410 Brenneke did not make a 2.5-inch slug so I was taking Brenneke slugs, cutting off the roll crimp removing the slug and a 1/2 spacer under the slug, cutting the case down to 2.5 inch and reassembling without the spacer and re-roll crimping them. In my 24-inch Win 9410 I was pushing the 114 gr slug at 2000 fps resulting in a shade over 1000 ft-lbs of muzzle energy. Most other commercial slugs where lighter (87 gr - 109 gr) and were in the the 600-750 ft-lbs energy levels.
That said I always got the best accuracy in my guns from the good old Remington Slugs but they were one of the lightest slugs and were pure lead so very fragile on impact.
My first buck taken with my 9410 using Remington sluggers. He was an old 8-point buck weighed about 160 lbs live weight. Slug when through a rib shattering it going in, nice hole through both lungs and heart and then fragment found logged in the far ribs
This was my second buck, a larger deer, 10-pts and ~180 lbs live weight. Taken with Brennake slugs. The slug that brought him down went through his spine and still exited, it was a very exciting encounter at very close range.
My (experienced) opinion on hunting deer with them: 410 slugs are marginal for deer hunting, if you are going to hunt deer with them you need to be willing to do the work to find a gun that will shoot them accurately and be willing to deal with their very short effective range. 410 slugs bleed velocity/energy fast going down range, most 410 slugs have lost half their kinetic energy within 50 yards. They are very much like hunting with a good crossbow and iron sighted revolver as far as range and accuracy. But if you are willing to live within their meager capabilities they are a fun challenge to use.
-rambling as usual.