Great now that i know everybody who has it i will be pumping you for load checks [img]images/icons/grin.gif[/img]
no just kiding [img]images/icons/smile.gif[/img] no its just i use a similar program for engine work and as you all said it has saved me alot of time and effort i just wanted to get some feed back on its value and acuracy. i have down loaded a demo version of it and will play with it and decide
There's some basic tricks to using it.
A. Try to build a load where Pmax and Z1 are on top of each other (in the graph), this gives the best groupings
B. Try to build a load with a minimum exit pressure, this will have the least bullet upset.
C. Keep the powder loaded in the brass just under or just over 100% (I use anywhere between 96%-105%), never right on 100%. If it's a 100%, some shells will be compressed and some not, they will have different burn characteristics.
D. After you've modeled a load, shot it and worked with it to get your groups tight, adjust the case volume setting in Quickload to get a matching muzzle velocity.
E. Once you've got a completed load, note the barrel time. This is your barrel harmonic time. Use this to create other loads for that barrel, match your barrel time and you should have a load that groups tightly.
Remember this is a modelling tool, and you must use it in conjunction with results from actual shooting really make it sing.
I don't have extensive time with it, but the boy's over in AccurateReloading use it extensively. It certainly worked when I was fighting with an Abolt II 300WinMag with BOSS to build a load. I had put over 300 rounds through this rifle trying the ladder method, a modified ladder method, etc. and couldn't get my preferred bullet to group any tighter than 1.5". So in desperation I bought it, learned how to use it, and modeled a single load, next thing I know it's shooting 0.5" groups.
I also use it to do what-if's comparisons when I'm thinking of purchasing a different caliber.