100m group predictions

[plumbs7]

Hi below is a 3 shot group at a 100 m of 175 smks , first lot ever that I've tried!


And below again is 9 shots of a 400 yd Comp on the weekend !


Sort of looking similar ? What do u think ? I ran out of ammo doh! A stuff up on my part !

[Steve N]

Looks like you are onto a good thing Graham. Any wind? Looks like the X ring was playing hard to get.
Steve

[Tod7.62]

Looking good Graham. The target looks cool does it feed back to your phone?

[plumbs7]

Looks like you are onto a good thing Graham. Any wind? Looks like the X ring was playing hard to get.
Steve

Conditions wind wise was easy ! But the rain and 100% humidity kept fogging up my glasses and I couldn't see! And the barrel mirage with that humidity was giving me 2 x rings ! So plenty of excuses lol! But was just interesting the only tuning I did was a 3 shot group then shot that 400 yd group and it looked a little like the 100 m group! But yep happy overall !

[DenisA]

G'day Graham,

I know your aware of this stuff already but I'll add to your thread.

I like to do my load testing at 100yards too. I would follow Williada's advice if I had a 140y opportunity.

I believe that testing at 100yards can yield an extremely competitive load but you have to be really careful in your interpretation of the results. I've seen plenty of groups where a bug hole that looks great and measures .4 - .5 moa opens up as the range increases due to all the parabolic effects and makes it a little less than competetive. I believe that if your testing at 100y and want to easily keep vertical within the 6 ring at the longer ranges, you have to find a load that's an absolute max of 0.3moa and low SD for the longer ranges.

Here's my example. Below is the best load (within a reasonable amount of testing) that I could find with that experimental barrel weight/damper attached to my barrel. I haven't measured it accurately but it looks like it measures about .35 - .4moa centre to centre given that the holes are .284".



I took this load to 300m a few weeks ago to test and the below pic was the result of 13 shots. Not including the low 5:00 shot, its basically a split group of .5moa. Including the low shot its opened up to what I'd guess is about .7moa. In this game we cant afford to have more than X'ring vertical at the shorter ranges.



I'm looking forward to testing my latest non barrel weighted load at 400 this weekend.

What do you think your 100y load measures?

[plumbs7]

Looking good Graham. The target looks cool does it feed back to your phone?

Hi Todd, just for everyone's info , this is what you'll be using next Nationals or Qra Queens ! I really liked it and I don't like Et's , so that's saying something !

It's just a screen shot of the website . But was really good to see live scores and my details as well as others straight away. Look up the Hex site for the weekend scores!

See u at Crows Nest Todd!

[plumbs7]

G'day Graham,

I know your aware of this stuff already but I'll add to your thread.

I like to do my load testing at 100yards too. I would follow Williada's advice if I had a 140y opportunity.

I believe that testing at 100yards can yield an extremely competitive load but you have to be really careful in your interpretation of the results. I've seen plenty of groups where a bug hole that looks great and measures .4 - .5 moa opens up as the range increases due to all the parabolic effects and makes it a little less than competetive. I believe that if your testing at 100y and want to easily keep vertical within the 6 ring at the longer ranges, you have to find a load that's an absolute max of 0.3moa and low SD for the longer ranges.

Here's my example. Below is the best load (within a reasonable amount of testing) that I could find with that experimental barrel weight/damper attached to my barrel. I haven't measured it accurately but it looks like it measures about .35 - .4moa centre to centre given that the holes are .284".



I took this load to 300m a few weeks ago to test and the below pic was the result of 13 shots. Not including the low 5:00 shot, its basically a split group of .5moa. Including the low shot its opened up to what I'd guess is about .7moa. In this game we cant afford to have more than X'ring vertical at the shorter ranges.



I'm looking forward to testing my latest non barrel weighted load at 400 this weekend.

What do you think your 100y load measures?

I totally agree with the 140 m testing if u r able to do it !
Below is a 5 shot group for 180 vld's that held I would say x ring maybe or sometimes better at 1000 yds . Not sure what it measures ? But take the flyer shot by myself I would say it's in the .4-.3 territory!.


This was my first detail with the first time using 175 smk and 3 shots at 100m of developement . I even have enough ammo for this one lol!
But yes Denis I agree with u !

[plumbs7]

There were maybe other factors at play . And this is where shooting groups can be deceiving in that human error or conditions maybe corrupting a grand tune !