Centre of Gravity

[johnk]

Plaster of Paris is the same. It takes forever to lose moisture unless you can stick it in an oven at low temperature. Been there, done that.

[macguru]

My wife said that plaster of paris has less shrinkage..... the oven would be fine, i have oven privileges ...

oh well i may not need to try again for a while... if anyone does make sure you wear eye protection !

[Longranger]

I have made additional weight for a stock by mixing lead shot with silicone. Works well but messy if you aren't careful. Absorbs vibration nicely too.

[bobeager]

Lead shot mixed with polyester casting resin (or normal polyester resin but be careful not to use too much catalyst or it can catch fire) in a mold works also.