How to Tune Your Barrel Without a Tuner! 

I am happy to see that small sample size testing is starting to receive scrutiny. There are so many variables that affect group size it is impossible to isolate a single variable like barrel harmonics unless you also remove all of the uncontrolled variables imparted upon the system by the presence of the cranky meat wagon attached to the rifle.

Actual barrel tuners absolutely 💯 work. Yes ive tried it. Over n over cold barrel hot barrel. Summer winter it absolutely works. Tgey tend to show more dramatic results w sporter barrels that whip more

Thank you for doing and saying this. I would love to see the repeatability of tuners.

Doesn't that create a gap between the barrel and brake which can build up in deposits and cause more accuracy issues?

Well done, it's about time we applied some of the most basic scientific principles to the discipline.

Yes! Drives me nuts when people do ladder tests, accuracy tests with factory ammo, etc... and shoot one 3 shot group that looks better than the others and call it good. You really need 20-30 shot groups (overlapping 3 shot groups) to verify anything statistically. Thanks for pointing this out.

Nice thank you - this reminds of the videos were people zero a scope with 2 shots. Stats wise, almost impossible....for it to be any ware accurate. At best it is as accurate as your ability to group a couple of shots.

What is needed is a large sample size study of the performance of rifle tuners. Take a barrel mounted in a rigid firing rig in an indoor 100yd range. Use laser sensors to measure barrel temperature. Break in the barrel with 200+ rounds before testing. Then fire statistically significant groups across an array of tuner settings. Maintain barrel temp between sample groups within a chosen fixed range. Then plot group size vs tuner setting and perform statistical analysis to validate the results. The ammo used would need to be tightly controlled to avoid confounding variables. Barrel aging/wear and fouling/cleaning effects would be a challenge to isolate.

Now show the variation in your ES and SD in all your groups. If the variation in your load is as large as the variation in group size, all you proved is that the variables in your ammo equals the variation in group size. The tuner will only show consistency if the tuner adjustment is the only variable being changed.

yup.... takes more than a 3 shot group to verify a load. lol, normally takes a couple weekends!

That’s why when i ordered my vudoo i didnt get it threaded. I haven’t seen a repeatable result using one. We shot my buddies 3 days in row waisting a lot of good match ammo, and all three day the best node was no where close to the day before, and all groups made were within the average for the gun.

May be in the comments already; Its my observation that barrel harmonics are affected with .001 inch increments. Not half turns on a break. But, good conversation. Thanks

Testing wise for tuner to see if it actually does make a significant difference I think starting with a horrible grouping gun like 3 inch groups lol then run same group testing like u done here on it

with my Harrels tuner/brakes I would shoot 17 - 5 shot groups 3 times adjusting the tuner a full revolution each time for 17 groups counting 0 as initial stage. with this amount of revolutions each time I would get at least 3 good nodes about 5 groups apart. therefore in future testing I only adjusted the tuner 7 times counting starting at 0 and this would give me at least ONE good node to set the tuner. my best 5 shot groups @ 100 yds in my 223 Remington reduced from 5/8ths" to 3/8ths" Harrel tuners are better because the tuner is over the barrel NOT on the end of the barrel utilizing full revolutions to adjust the tune in lieu of 1/8th turns to adjust the tune. It's very easy that even vibrations will move the tuner very easily therefore a 1/4" adjustment thru vibrations or whatever could change the accuracy dramatically. Plus Harrel tuner/brakes fit the barrel very evry well and don't look like a blob on the end of the barrel like other tuners.

In short range nbrsa we all test with 3 shots. If we find a node then it's a 5 shot group to verify it.

I shot a tuner on rimfire last year.....after 4 months and thousands of rounds of shooting with a tuner I saw no appreciable improvement during that time. You would see the groups open up and close up, but without the tuner, the groups were just as good if not more consistent. A tuner is not the mage sauce. I no longer use a tuner.

Great and different analysis, others should take your approach to increase confidence in what they are seeing.

Tuners definitely work. IMO 💯

First thing you must buy if you are testing for tuning is a lead sled and something that holds the rifle down , no shooter can be that accurate all the time without one. I installed a Harrells tuner/brake on my Rem 700 tactical 223 and previous my best 5 shot groups at 100 yds. were 5/8" now they are 3/8". Tuners do work but they only fine tune your shooting not make drastic changes in group sizes.

Nice theory, what is your next move??

It’s called bullet seating depth

can i order this item?

What brand of brake

If you really want to "accurately" test anything and be able to extract any valuable data, you have to remove every other "removeable" variable that can adversely effect that data (like the human factor for example). Even a pro level F-class competition shooter is not as accurate as his or her rifle likely is.

Listen to everyone. Trust no one. Test everything.

Nice shirt!

Shoot five ten shot groups!

which is why you shoot a 10 shot group.

प्लीज कोई तो हमें भी सोपर्ट कीजिये 🙏 और आगे बढ़ाये

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Yep it really triggers me to see one group

Tries to disprove the tuner works and forgets its not a tuner.

👍 🇺🇲 Thanks, Reese.

3 shot groups are almost worthless.

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