What's the 1 shot off to the left behind the stats window?Quote:
Originally Posted by Benj
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What's the 1 shot off to the left behind the stats window?Quote:
Originally Posted by Benj
Good spotting I wondered if someone would see that ��. That was shot number two through the barrel after having it fitted. I didn’t initially see that when I was doing the shots as it was behind the window.Quote:
Originally Posted by gimp
Seems like a fairly significant outlier, don’t statistians normally use the median in those situations rather than the mean?
It's an outlier in that sample, however can the sample be expected to reasonably represent the population?Quote:
Originally Posted by Benj
Your mean radius from the 10 shots measured is 0.19 inches - the expected 95% diameter around MPOI should be 4.16x0.19 = 0.79 Inches
Your mean radius would be a little larger if that shot included.
It's probably inside the 100% expected diameter? Just happened to get one from the far right hand tail
Yes I agree. Adding that shot on doesn’t change mean radius by much. I had just missed it!Quote:
Originally Posted by gimp
Either way it looks like you've got excellent precision for any practical use.
Mate runs factory ammo out of an A Bolt. Same projectile but as a reload [with BM2] runs 100fps [via new Garmin chrono] and much tighter. Barrel has now had a few rounds through it. First 3 on cold barrel very tight but second 2 start to show fliers. Aim is to use a similar projectile [albeit] 1gr lighter but same powder using same base then 1/2 grain increase to a full grain maximum over 3 seperate groups. Question is whether barrel will react in a ladder whilst it is still coldish [3 shots].
I have yet to see a barrel where shots actually walk due to heat in a 10 round group. Maybe they exist. What I have seen is that the "fliers" just fill out the true precision, and people don't like to see it.
Ran a simple load selection process again the other day, 108 berger elite hunters in the 6gt. Alpha brass cci 450. 37.6gr 2209 expecting about 2750fps, seated 0.050" off the lands
2744fps and 0.059mrad mean radius. 10rd group 0.7moa or something. Can I really improve on that with "tuning" for an 8lb shoulder fired rifle? Do I just happen to keep accidentally testing the "good load" at "the node" with my arbitrary selections? It seems unlikely.
Attachment 277647
I used range buddy to check measure some dodgy chino scope rings i found on aliexpress. Funny how they never declare the height under the ring down to top or rail...Quote:
Originally Posted by Roarless20
BUT using the photo scale feature on range buddy I was able to get within .5mm of what it turned out to be (8mm)
[MacGyver music required here]
Attachment 277652
Having trouble trying to get impact dots on app to target???.Have got measure points and point of aim.HornadyQuote:
Originally Posted by gimp
Another example. Jased81's tikka7mm08. Case full of 8208, 162 ELDM, seated somewhere. Load 10, shoot it, it works velocity in the right zone. Development done. 1.25moa 10rd group.
Attachment 278933
I thought I would try @gimp 10 shot group so took my sakos to the range today these are 10 shot groups shot off a bipod with a small rear bag and no forward hold.
Sako 85 carbon light.223 19.29mm
Sako 85 carbon light 6.5 creedmore 20.14mm
Still working on my 85 rem mag and that does have ejection issues where the cases hit the scope and fall back into the chamber.
Will be calling Beretta tomorrow https://uploads.tapatalk-cdn.com/202...f21588e48c.jpghttps://uploads.tapatalk-cdn.com/202...d8a5d5ef37.jpg
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Good shooting!Quote:
Originally Posted by 25/08 IMP
Good precision! Give the alternative simple load development approach a go next time...Quote:
Originally Posted by 25/08 IMP
For hunting rifles I load one round of 0.5gn increments upto max or even a gn or so over
I shoot those with the sole purpose of finding pressure signs
(essentially my personal max)
After that i decide on the maximum safe in my rifle
Load a batch and go hunting
Target rifles require a little bit more fucking about as you are trying to get the most possible
But for a hunting rifle I don’t give a fuck if it shoots 0.1moa or 1moa it really makes zero difference
And to be honest if a modern accurate hunting rifle (tikka for example) can’t shoot 1moa with that method then you would probably get more from changing your projectile and or powder choice than fiddling around for hundreds of rounds
@gimp is right for sure but it might have been more beneficial to prove the point to spilt your 20 round groups into 4 separate 5 round groups and then share the average mean radius
It just would’ve made more sense to people who didn’t really understand what you are trying to prove
