What mold is this?

[Timber Wolf]

Added exponentially to my mold collection today. Bought out an old friend’s stash. Don’t think we found them all, and he is probably going to give me a bunch of bullets he has already cast. May try and buy his very extensive reloading equipment also. But I digress. Got this .50 (?) Maxi ball mold, aluminum and only marked “771”. I don’t have any others of this type to compare but assume it is a T/C? Interestingly, the stash also contained a set of Lyman steel mold blocks for a nearly identical bullet. Which brings up another question, which blocks would you prefer using? The steel Lyman or these?

 

[oldwood]

Maxi ball. circa........early 1970's and forward..... these came in 45 , 50 cal. , and 54 cal.

 

[ZUG]

T/C sold Maxi-Ball molds for their rifles. They did not make them but contracted them to be made by mold manufactures mostly if not all from Lyman. I like steel molds but not the prices. I have a lot of Lee molds which are OK and the price is even better.

 

[Maven]

Added exponentially to my mold collection today. Bought out an old friend’s stash. Don’t think we found them all, and he is probably going to give me a bunch of bullets he has already cast. May try and buy his very extensive reloading equipment also. But I digress. Got this .50 (?) Maxi ball mold, aluminum and only marked “771”. I don’t have any others of this type to compare but assume it is a T/C? Interestingly, the stash also contained a set of Lyman steel mold blocks for a nearly identical bullet. Which brings up another question, which blocks would you prefer using? The steel Lyman or these?
View attachment 218942

TW, I've used both "steel" (meehanite) and anodized aluminum Maxi-Ball moulds and don't have a preference when casting. However, I most certainly prefer the T/C sourced moulds over the Lymans as the latter varied quite a bit in diameter and thus weight. I.e., some cast too small to be engraved by the rifling as they were designed to do, others were oversized, heavy, and harder to start. The T/C's on the other hand were right on the money and certainly cast beautifully. Btw, judging by the sprue cutter shape, I think your mould was produced by Green Mountain or possibly Shiloh, although Ohaus also made them.