Accuracy International Picture Thread

I don't think CDMs are really that necessary. Accuracy and precision are. With the accuracy of today's chrono's I think we're better off truing BC than velocity like we used to do in 2006. Guys that experiment with Oehler 88's are finding that BC varies from bullet to bullet and from barrel to barrel. So I would find load that starts accurate and true a G7 out to just prior to the trans window, based on a Garmin Zero speed. Then CAL DSF in trans prior to sub and again post subsonic by shooting and gathering data(like MK20 suggests) and blammo, you have a CDM for your gun.
What are your thoughts on 4DOF since it uses muzzle velocity as a known parameter? Sounds like you might like that better than the AB method...
 
So you don't know.

Got it.

Thank you.

-Stan
Depends on the round used, the friction of the barrel, and the thermodynamic characteristics of that barrel. No one can given an answer. Just start writing down speeds over time. Ultimately, there should be a change as a new barrel "breaks in and settles down" no diferent than the horsepower of a car when first built versus the power of that car after the engine is broken in. Don't think anyone is really going to give you a better answer. Give it a couple hundred rounds and see what happens.
 
This is supposed to be an AI pic thread not an AB ballistics theory thread...

so back on topic please.

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Depends on the round used, the friction of the barrel, and the thermodynamic characteristics of that barrel. No one can given an answer. Just start writing down speeds over time. Ultimately, there should be a change as a new barrel "breaks in and settles down" no diferent than the horsepower of a car when first built versus the power of that car after the engine is broken in. Don't think anyone is really going to give you a better answer. Give it a couple hundred rounds and see what happens.
Thank you!

-Stan
 
Bro, we're trying to nerd out over here on some super serious high brow theoretical ballistic shit; super important high end stuff! ....and you're butting in with some mouth-breathing day 1 shit like, "Do barrels speed up?". 🤣

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My bad.

I left out the word when.

As such, I shall new rephrase:

“When (as in round count) do the AI UK barrels in 308 begin to speed up?”

That should do it.

-Stan
 
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Someone enlighten me on that mount height and cant choice. Seems.. excessive.
I saw this rifle mentioned a couple of weeks ago here:


And then found this:

 
I saw this rifle mentioned a couple of weeks ago here:


And then found this:


Makes me wonder what clip-ons they’ll employ. Really limits the options if that was a consideration. Midwave can accommodate the different cant angles, but not as easily done with long wave. I2 is less of a problem.
 
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Makes me wonder what clip-ons they’ll employ. Really limits the options if that was a consideration. Midwave can accommodate the different cant angles, but not as easily done with long wave. I2 is less of a problem.
They are just victims of the system.
Probably did that so no matter what clip on they use or have access to, or future procurement, will all fit
 
Took the little lady out on a date and had a mk12's maiden voyage. She loves the clone m118lr and 168fgmm.

Also, got data on 168 gr loads from a 16" barrel for those wondering from before.
Hornady black amax: 2508, 17.8es, 7.3sd
Hornady match eldm: 2517, 34.1es, 15.1sd
Fgmm: 2442, 37.2es, 12.8sd

Really need to take more esthetically pleasing photos one day.

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There. Bundeswehr G22A2 .300 Win.
UPDATE: Information on the G22A2, best I've found to date.
Why do Germans always have the sickest drip? I mean take the insignias out of the picture (to be politically correct so nobody gets a hard on me this evening), since ww1, you know…
 
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Are you sure magazine capacity restrictions is what you want to hitch your wagon to? 🤣
I don't think they should be restricted....I think people should learn to do mag changes... Why did 12 round stages come about? But I digress



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Do you think you could beat me in a mag change during a 15 rd stage if you had a 10rd mag and I had a 15rd mag? Clearly, there's no way the fastest mag changer in the west can beat someone that doesn't have to change mags at all. I don't think anyone doesn't know how to change a mag. I just don't understand why 10 is the magic number. Why not ask or expect better? Why not 12 or 15 rounds in a mag? Why is 7 minute abs all fucked up but 6 minute abs is right?
Do you think 12 round stages just magically started happening because that's ideal number per stage lol

If the intent of the 15 round stage was to do a mag change and you brought a 17rd mag just to game it I mean I guess which is pretty much what all of prs has said.

I agree why 10... Why even reload at all? Why not just belt feed it? Why not a drum?
 
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Where would you find a 17rd AICS mag? Or a bolt action AI rifle that takes belted ammo? You're speaking in hyperbole. It's not reasonable. But a 12 or 15 rd AICS mag is. I mean what if someone made a 20rd double stack, doublefeed SR25-type mag that allowed a 2.990" COAL in a AICS footprint that fits a R700 custom action or ATX? Would you scorn the manufacturer or would it be a step forward? Why would you resist forward progress? Do you think you are a more pure subscriber to fundamental skills than I am? Do you think you've dedicated more time to speed mag changes than I have in my life? I doubt it.

Sometimes material solutions outweigh training solutions. Yes training is important. But don't be stuck in the past. As far as why do PRS match directors do what they do, I don't think they know why. They do a lot of monkey see, monkey do shit. And contrived, made up shit. But as far as pushing past 10rd stages...why is every stage 10 rds? Why don't we shoot 20 rd stages? Or 30rs stages? Bring it big shifter.

I'm not arguing that things can't progress.... You will get a 16+rd aics pattern mags when md start doing 15+ round stages on the reg .... I'm not scorning the mfg they are filling an obvious demand.

Pretty sure I made 0 assumptions or comments as to your abilities home skillet nor did I make any comparisons to my own

I am merely providing free commentary on a sat night to something I find comical about the competitive shooting world. It's not the first time and won't be the last

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