Need confirmation on item

[BigJT]

Hey all! So this isn't exactly a new find. Actually it's somewhat old now, but I'm finally curious enough to ask about it. I found this about a year ago underneath the basement floor of an early 1900s house i was helping to renovate (in Burlington, WI) At first i thought it could've been a cannon ball, but upon further inspection it looks like an old shot put? Seeing as I'm pretty new to all this, could you guys (and gals) help a newbie out? A VERY rough weight is about 8 lbs. Thanks in advance!

 

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[NOLA_Ken]

Based on what I have learned here from TheCannonballGuy, I'm going to say it's a shotput as well

 

[Tony in SC]

Back in high school, the girls track team used an 8lb shot put. The boys used a 12. Tony

 

[Reed Lukens]

Looks like a mill ball from a large ball mill. We used to collect those out of the old ball mills when we were kids. They came in many different sizes from a couple inches up to maybe 10" around that were too heavy to take home. I still have a couple sitting next to the stove for fun.
check out the link
Magotteaux hollow balls and ring to equip vertical ball mill. - Image - Power Technology

 

[TheCannonballGuy]

During the past 150 years, multi-MILLIONS of round (and "round-ish") metal balls have been have been manufactured for civilian purposes, having nothing to do with artillery. Some examples are:
Mining-&-Stonemilling Industry rock-pulverizer balls ("Mill-balls"),
large ball-bearings,
sports Shot-Put balls,
ornamental-ironwork balls (such as a gatepost-top),
and even cement-delivery truck tank-cleaner balls.

Therefore, we cannonball collectors needed a way to tell with CERTAINTY whether an "old-looking" metal ball is an artillery ball or a civilian-usage ball. So, to give our fellow collectors (and the public) the needed information, historian David Poche and I co-wrote an extensive education article with detailed instructions (and photos). You can read it online, for free, at:
SolidShotEssentialsMod

Extremely-precise weight and diameter measurements for cannonballs, Grapeshot balls, and Canister-ammo balls used in the US and Canada from the Revolutionary War through the Civil War can be viewed online, for free, at:
www.civilwarartillery.com/shottables.htm

BigJT, I see your info-request is your very first post here. Welcome to TreasureNet's "What Is It?" forum, the best place on the internet to get unknown objects CORRECTLY identified.