Not bad at all, you can get alot of feedback from dutch members, because we speak englisch as a second language most time.
Can you tell me how many lift is needed for a 5 inch cylinder per gram of finished shell?
I use willow pulverone lift and less than 5 mm between shell and mortar.
I think I will blow my shell to the moon with 10%
Yes I see most Dutch speak English very well.
When you say 'willow polverone lift' do you mean it is unmilled B.P lift?
There are some variables in calculating the amount of lift needed for a particular shell.
round or cylinder type shell - Shell Diameter and clearance in the mortar - single or multi break - weight - type of lift powder you intend to use - how high do you want to put the shell etc etc
As a rough guide 1 Oz per Lb (28gms per 450gms)of shell weight is about right for a single break round shell if using commercial lift powder like Goex or Wano brands. Cylinder shells normally have a little less clearance in the mortar than round shells so you can use a little less.
A 5 inch cylinder shell is going to weigh between 1.5 and 2Kg and I would use between 90 and 120gms if using commercial 2F powder.
Now if you are using homemade powder you might need more or less than this amount depending on the quality and granulation of your lift.
I don't like ballmilling and see no point in it for shells over 3 inch so I make all my lift powder by a simple screening of the fine ingredients 3 times through a 40 mesh screen, moisten with water then granulation through a screen to 2F size (passing a 4 mesh screen but retained on a 12 mesh screen) I use 3% SGRS as a binder.
This powder is not as strong as commercial powder but what the hell ..... it's quick to make, cheap and safer to make than ballmilling/pressing pucks/corning etc and it works just the same ......you just need more of it. For this rough mixed powder I use approx 160 gms for a 5inch shell.
