The one on the right is RCBS 44-250KT. With WW alloy, this one drops at ~265gr. I'm told that this is the closest modern .44 cal. mould to Elmer's original design - and this is the best bullet I've ever found for any of the .44 Specials or Magnums I've had. A lot of this bullet seats out well ahead of the case - giving lower chamber pressures than one that seats deeper.
The one on the left is Lyman 429421 and drops bullets at ~240gr. If you look closely, you will note that it is slightly shorter than the RCBS version, and has a narrower front driving band than the RCBS version. The only reason I still keep this mould is because it is a 4-banger and can really churn out a pile of bullets in a short time.
The center bullet is a SWC, but was designed by Ray Thompson, a forest ranger and casts at about ~250gr. Thompson's answer to leading problems was to stick a gas check on it. Skeeter Skelton was a proponent of the Thompson design, and so was I until the price of gas checks became so high, I no longer consider this bullet worthy of my thrifty Scots heritage. This is a great bullet for a .44 Magnum rifle - if it will cycle and chamber reliably in your gun.