Sartorius Magnetic GD503 Scale? Should or Shouldn't

[brian427cobra]

Great video on the Prometheus

http://www.youtube.com/watch?v=6scLPhkT-8w

http://www.youtube.com/watch?v=2sqNcs-uWzY&NR=1

The second video the Gen 1 is my Prometheus, I bought it from Josh, whom I have been shooting with for years, I ordered my Gen 2, for me it's all about the speed of making ammo, and the confidence that everything is as good as it can be, so I say get the GD-503, or really speed up your long range loading routine and pop for a Gen 2 Prometheus.

 

[solid_squirrel]

Thanks Jay,

I have always assumed that larger charges were more tolerant - I guess I'll have to re-evaluate that theory.

I do know that I had one load in the 308 that was touchy. It shoot well most of the time, but it completely fall apart too. I've recently decided that it wasn't really a good load and gave it the boot.

I still have some testing to do, but I'm really looking forward to next year when I get to wring the "new" load out.

Even if there isn't a trend of being more tolerant for larger charges. If you have a certain margin of error, that amount will be proportionally smaller relative to the total charge weight, the larger the charge gets. Right?

 

[Keith Glasscock]

I didn't realize how poorly typed my post was... I'll have to edit that!

To answer your question, the percentage of total charge decreases as the size of the charge increases. For example, a .1 grain error is 1% of a 10 grain charge, but only .1% of a 100 grain charge.

While decreasing the charge error to zero would be of some benefit, the reduction in ES would only be a small portion of the total. There are simply too many variables to deal with in order to get a statistically valid zero ES. I have found other ways to limit ES in my loads. Would reducing my load error from +or- .05 grains to +or- .01 grains improve my ES? Of course it would! In my chosen game (F-class TR), would it make a difference in scores? Maybe, once in 20 matches it might pick me up one point or 1 X. In the big scheme of things, I have much bigger fish to fry (my skills could use a lot more work).

By comparison, Jay's F-Open rifles could very well have been costing him 1 point and/or 1 X on a much more frequent basis with the ES and SD problems he was experiencing. Both of which could be the difference between winning and being in 10th place in his discipline. F-open tends to be a bit more perfection oriented than F/TR score-wise.

Off to fix my horrible grammar and spelling...

 

[1066]

I believe a good beam scales is quite capable of single kernal accuracy if properly set-up. The name of the game is consistency - the same charge every time.
http://www.youtube.com/watch?v=dnVOoGd1bDU&feature=player_detailpage

 

[solid_squirrel]

I didn't realize how poorly typed my post was... I'll have to edit that!

To answer your question, the percentage of total charge decreases as the size of the charge increases. For example, a .1 grain error is 1% of a 10 grain charge, but only .1% of a 100 grain charge.

While decreasing the charge error to zero would be of some benefit, the reduction in ES would only be a small portion of the total. There are simply too many variables to deal with in order to get a statistically valid zero ES. I have found other ways to limit ES in my loads. Would reducing my load error from +or- .05 grains to +or- .01 grains improve my ES? Of course it would! In my chosen game (F-class TR), would it make a difference in scores? Maybe, once in 20 matches it might pick me up one point or 1 X. In the big scheme of things, I have much bigger fish to fry (my skills could use a lot more work).

By comparison, Jay's F-Open rifles could very well have been costing him 1 point and/or 1 X on a much more frequent basis with the ES and SD problems he was experiencing. Both of which could be the difference between winning and being in 10th place in his discipline. F-open tends to be a bit more perfection oriented than F/TR score-wise.

Off to fix my horrible grammar and spelling...

I hope you didn't think I was pointing out your spelling or grammar, haha! I was just thinking that it logically followed, since the error is constant, that even if large charges aren't more tolerant to an error which remains proportional - the error doesn't remain proportional.

 

[johara1]

I shoot a Dasher a 1K,I too used a dig. scale and have since went back to a beam scale that was done by a forum member. Group size dropped,vertical was less ES in the single digits SD as low as zero.The scale alone will not do it,no matter what one you use but how you use it.
If you plan to shoot small,trimming and pointing and annealing play a big part. You better have a rifle that will shoot in the low one's at a hundred, if it doesn't shoot small no powder scale will change that........jim

 

[bozo699]

I shoot a Dasher a 1K,I too used a dig. scale and have since went back to a beam scale that was done by a forum member. Group size dropped,vertical was less ES in the single digits SD as low as zero.The scale alone will not do it,no matter what one you use but how you use it.
If you plan to shoot small,trimming and pointing and annealing play a big part. You better have a rifle that will shoot in the low one's at a hundred, if it doesn't shoot small no powder scale will change that........jim

Very good point Jim.
Wayne.