I've shot all of them (44 and 45 cal ones) at one point or another.

My experience is that:

• .430 300g are more accurate than the .452 300g
• .452 300g (non-mag) are great if you shoot longer distance as the bullet will open up nicely at lower velocity
• .452 300g MAG are great for close range shooting. If you don't shoot more than 50 yards and you want a tough bullet to shoot through brush or through shoulder blades. This is what you are after.
• .452 240g MAG is an excellent deer killer.
• .452 250g performs about the same as the 240g MAG in my opinion.

Hope this helps. My favorite two are the .452 240g MAG and the .430 300g