When did shotshells start using magnetic bases?

[ColtPythonElite]

I shoot clays with a lot of reloaders that use steel base hulls. Some hulls they favor more than others. They often report 6 or more loadings from the ones they like.

 

[kudu]

The Federal Top Gun target shells reload quite a few times, I usually toss them after about 5th or 6th reload. Most guys just toss the brand new once fired ones so I always have plenty to reload. Haven't been shooting much as the price of reloading components is about more than new shells. I have a garbage bag full of old AA hulls and a couple five gallon buckets of once fired Remington Nitro hulls. About the same amount with AA 20 gauge and a few thousand 28 and .410. Really should try to reload them someday.

 

[Lo-Profile]

It's mostly the steel in the primers on quality cases.

 

[entropy]

No. The issue with shotshells is the other parts. The base was coming lose and lodging in the bore after the shot and being a bore obstruction for the next and is primarily why cheap shells can’t be reloaded, or reloaded only once by the daring. Basically quality of construction between reloadable and non reloadable hulls.

Not necessarily. The Remington Gun Club hulls are very reloadable, yet the early AA-HS hulls ( @2000-2005) which are brass based, had problems with the internal base separating and obstructing the barrel.
Where the 'one and done' philosophy came in regarding reloading steel based hulls is with promo shells that have a paper base wad inside. These burn out real fast, resulting in uneven, possibly dangerous pressures with a load that would be fine in a quality hull.
I just loaded up 100 Gun Clubs tonight. I keep them to the 7/8 oz. loads using Ramshot Competition, as I found out yesterday that those don't stick in my Ljutic. When I did 1 1/8 oz loads with Green Dot, about one per box would stick.