I have been looking at the Forster co-Ax case run out gauge tool. Is this a useful tool in regards to accuracy? Should i spend the 100 bucks or save my money? I like those little bug hole groups and if i thought this tool would be useful i will buy one. Whats the scoop?? Thanks guys!! Lee
case run out tools. are they needed??
- Thread starter skeetlee
- Start date
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jackie schmidt
New member
Case Run Out
The big question is........."how much is too much"
I have attaempted to find out for myself, using my Rail Gun.
I have one of the little case checker-straighteners sold by Brunos. A while back, I sat down and fired groups using segregated cases cases, those that ran less than .001, and those that ran out more.
Up untill about .003 runnout, I could not tell the difference in the size of the groups I was able to shoot that day. It does seem that over .003, flyers would occur. But, some of the rounds that ran out that much went into the group. Go Figure.
As a note, I had to alter the rounds to make them run out, as my set-up produces rounds that generally run .001 or less.
In Benchrest, we strive to keep every variable that we can controle at a minimum. It would seem that it does no good to strive to chamber barrels within the nearest .0001, and then stick a round in it that runs out 10 times that much.
Or maybe not. I have been at matches where shooters were shooting quite well. Upon checking their loaded rounds, it was found that the runnout was more than what many of us would call acceptable.
To answer your question, it is a good idea to know if your loading equipment does produce straight rounds. If it does not, then you have to decide what you are going to do about it.
Is straightenning an option. I am not sure. tapping around on a round to get it to run straight seems like a good idea, untill you actually do it. Seems a little abusive. If you have to hit it more than once, it would seem that neck tension would be compromised, many believe that consistant neck tension is probably the more important of the two.
Probably not a bad idea for anyone interested in extreme accuracy to have a loaded round checker. At least you know if your rounds are straight.
But deciding on what to do with what ever info you garner from it is another question. I spent a lot of time and effort getting my set-up to where it produced consistant rounds, it ain't that easy.........jackie
The big question is........."how much is too much"
I have attaempted to find out for myself, using my Rail Gun.
I have one of the little case checker-straighteners sold by Brunos. A while back, I sat down and fired groups using segregated cases cases, those that ran less than .001, and those that ran out more.
Up untill about .003 runnout, I could not tell the difference in the size of the groups I was able to shoot that day. It does seem that over .003, flyers would occur. But, some of the rounds that ran out that much went into the group. Go Figure.
As a note, I had to alter the rounds to make them run out, as my set-up produces rounds that generally run .001 or less.
In Benchrest, we strive to keep every variable that we can controle at a minimum. It would seem that it does no good to strive to chamber barrels within the nearest .0001, and then stick a round in it that runs out 10 times that much.
Or maybe not. I have been at matches where shooters were shooting quite well. Upon checking their loaded rounds, it was found that the runnout was more than what many of us would call acceptable.
To answer your question, it is a good idea to know if your loading equipment does produce straight rounds. If it does not, then you have to decide what you are going to do about it.
Is straightenning an option. I am not sure. tapping around on a round to get it to run straight seems like a good idea, untill you actually do it. Seems a little abusive. If you have to hit it more than once, it would seem that neck tension would be compromised, many believe that consistant neck tension is probably the more important of the two.
Probably not a bad idea for anyone interested in extreme accuracy to have a loaded round checker. At least you know if your rounds are straight.
But deciding on what to do with what ever info you garner from it is another question. I spent a lot of time and effort getting my set-up to where it produced consistant rounds, it ain't that easy.........jackie