A second vote for BACo molds, good selection to choose from with useful options - as per the mentioned reduced driving bands on GG bullets They will also modify existing designs eg shortened loa of a bullet or give a specific diameter of dropped bullet you need if you are using PP. Fast turn around, ignor the out of stock on the web site.

Commercially pure tin can be expensive but you sometimes see some on ‘the bay’.

If you are getting serious about casting then the locking mold handles are a good addition, also available from BACo: https://www.buffaloarms.com/aluminum...les-ctaluminum

Brgds Terry