I would not have expected that result. I guess you're right about the harmonics with the flash hider. Thank you.
@AmbGun
4 жыл бұрын
I would like to see someone repeat my test. Any rifle with a pencil barrel...with & without muzzle device. A RDB with pencil. An RDB with medium profile.
@alexanderdiaz0512
3 жыл бұрын
You've given me so much info about my rifle. This is really awesome. I actually spoke to Keltec and will be sending in my Defender to have the thicker barrel installed. I just don't trust the pencil one it comes with.
@AmbGun
3 жыл бұрын
Depends on your needs. The pencil barrel is lighter and that is my preference. It is accurate as long as you don't mix bullet weights. And as noted in this video the difference is less when not running a muzzle device. I have ordered a lightweight compact titanium comp/flash hider to try. I suspect it will give me results similar to the bare muzzle. Learn to become ambi (check out my How to Become an Ambidextral Gunfighter series). Once ambi, you'll find that maybe that pencil barrel offers some unexpected "optimized use of cover" benefits. kzitem.info/door/PLVlCoEE1rzM4PGhm-vNuo_ca8rduMjtIK
@alexanderdiaz0512
3 жыл бұрын
@@AmbGun I'm just worried about shot stringing. Have you had that happen when the barrel is hot without the flash hider on?
@AmbGun
3 жыл бұрын
@@alexanderdiaz0512 I have not, but I'm not mag dumping either. During my Project Appleseed AQT's I had no problem during the "rapid fire" stages...but that "rapid fire" is about 1 round every 2 or 3 seconds and only for 10 rounds. Here's my rough, maybe unexamined, opinion. While a barrel may lose accuracy when it gets hot, my ability as a shooter is probably going to fade even faster. Maybe that lightweight pencil barrel helps prevent shooter fade. As a civilian I do not anticipate laying down volumes of suppressing fire over an extended period. But rather 15-20 rounds, then move, sit quiet, check, a few rounds, move, sit quiet, communicate with teammates, a couple shots, move again...repeat.... You can learn to work around things too. With some testing your can learn that my cold barrel shot hit say 1 MOA below my zero. Next 20 rounds POI matches my sighting system...than as things get hot maybe I hold 2 MOA hgh. Even precision shooters running bull barrels know the difference between their cold bore point of impact vs a warmed up barrel. Not trying to dissuade you from swapping a pencil for a medium profile, just keep in mind there are opportunity costs to any choice....for example would your prefer to carry a pencil barrel rifle with an extra 20 round mag or a bull barrel without the extra ammo?
@alexanderdiaz0512
3 жыл бұрын
@@AmbGun hey, sorry for not answering back. I've decided to stick to the pencil barrel and will probably remove the flash hider. Specially during these times I wouldn't want to send it to Keltec and then not know how long it might take. I'm in Florida and could honestly just drive it up there but dont think its worth the extra weight. Thanks again.
@AmbGun
3 жыл бұрын
@@alexanderdiaz0512 The stock flash hider and pencil barrel is fine as long as you don't switch between different bullet weights. Or record the change and change your zero as you switch. I hope to try a lightweight titanium flash hider. Or maybe get KekTec to send me the thread protector used on the Hunter model.
@AkumaQiu
2 жыл бұрын
Your barrel is the stock 20 inch right? It's still a pencil barrel
@AmbGun
2 жыл бұрын
Yes, 20" pencil barrel. If running a muzzle device, I'd prefer a medium profile barrel. Pencil barrel means less mass to move and stop when snap shooting from cover.
@ExplorinInTheWoods
3 жыл бұрын
Different weight bullets will impact differently, the gun will shoot differently minus a flash hider not just because of the weight but also you can have pressure on the crown of the muzzle. Your gun can also heat up quickly with a pencil barrel.
@AmbGun
3 жыл бұрын
Yeah, my Car's med prof barrel shows minor changes in zero. So I attribute the majority of 8 moa change on the RDB to the muzzle device affecting the harmonics of the pencil barrel. I don't mind pencil barrels, just have to pay attention if switching ammo. At some point as I gather more data, I might add a cheat sheet, by bullet weight, to the RDB's butt stock. Although, I pretty much dedicate the 75gr to it.
@ExplorinInTheWoods
3 жыл бұрын
@@AmbGun you need to see if it gives you the same results in reverse. Don’t start light go heavy and see if the shift is due to the heat not the rounds being different weights.
@AmbGun
3 жыл бұрын
@@ExplorinInTheWoods We've done the test backwards and forwards. kzitem.info/news/bejne/s2erx5mrpZh9a6Q
@AmbGun
3 жыл бұрын
And tested for the value of a 16" + flash hider vs 20" without. kzitem.info/news/bejne/1XiFyIx6eqh9dYY
@AmbGun
3 жыл бұрын
@@ExplorinInTheWoods Lots of episodes on RDB. Consistent 8 moa change from 75 to 55. Hopefully my titanium FH shows up soon and we'll repeat the test....anticipating that maybe we shrink the range from 8 moa to 6 moa. For those who might be seeing this comment but not the videos, were talking an 8 moa change in zero....not group. kzitem.info/door/PLVlCoEE1rzM60wsyiKI5X6CuBlRYCRSkI
@regisphilbinsscrotum6631
4 жыл бұрын
Have you tried the heavy bullets first?do they do the same cold?
@AmbGun
4 жыл бұрын
Not specifically in this test. I know that 55gr cold bore shot is close enough to hot bore zero as to be indistinguishable from my personal variation...with or without flash hider. A variable worth trying to eliminate. I will zero with flash hider using 75 gr then see if next day cold bore shot is at variance.
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