Bullet stabilization, barrel fouling or breaking in?

[waveslayer]

IME single digits SDs are great for bragging rights. Not so much on targets.

At distance you will see a difference. With a standard 6.5 Creedmoor, 30 fps equates to about 7", for my load at 1000 yards, my bullets are pointed, so keep that in mind... which means I'm getting about 6% better BC out of my berger 140's. So the average Joe will see about a 10-12" drop. That's a lot of dispersion @ distance. Plus a lot of guys are using Barnes and their BC's aren't known to be in the top tier. So yes, single digits of SD should always be the goal

 

[rjgonzo]

IME single digits SDs are great for bragging rights. Not so much on targets.

I agree. I'm going with what works best. It's good information but not the ultimate goal.

 

[skipglo]

Try and get that SD below double digits, you will see better results

SD is below double digits

 

[skipglo]

Definitely not shooting bad by any means...but personally...I'd shoot something in the 150 gr -165 and speed them up a bit just for comparison! Just me

 

[Horse1]

Might be worth running a couple patches of rubbing alcohol then a couple dry patches after that, once you've completed your cleaning routine. For me that's seemed to greatly reduce the number of foulers I need to return to original POI/POA as well as "normal" accuracy.

 

[rjgonzo]

Definitely not shooting bad by any means...but personally...I'd shoot something in the 150 gr -165 and speed them up a bit just for comparison! Just me

Yes, I agree. I'm just getting started.
My initial plan was to eventually use a Barns 140 range TSX, TTSX OR LRX. Depending on what the rifle shot best. I really like the performance of the Barns bullets.
I started with the 180s because they are easier to tune (in my experience) and I could quickly see the potential of this barrel. This is my first Wilson, other than a Cooper I owned many years ago.
Also, if I end up using the 180s, I think I could get more energy. This is a very mild load. I could probably, safely find one or two nodes at higher velocities.

 

[skipglo]

Yes, I agree. I'm just getting started.
My initial plan was to eventually use a Barns 140 range TSX, TTSX OR LRX. Depending on what the rifle shot best. I really like the performance of the Barns bullets.
I started with the 180s because they are easier to tune (in my experience) and I could quickly see the potential of this barrel. This is my first Wilson, other than a Cooper I owned many years ago.
Also, if I end up using the 180s, I think I could get more energy. This is a very mild load. I could probably, safely find one or two nodes at higher velocities.

Then I would definitely add a little Horsepower to your load...it may be all you're lacking !! Best of luck...in my limited experience....Heavies need horsepower .... otherwise there's no point in shooting them.

 

[MagnumManiac]

What happens when you shoot next and the results you see are the opposite?
Nothing you have shown is the full picture for true dispersion…
I don't base ANY results on ONE GROUP, no matter the distance.

Cheers.
P.S.
Way more shooting needs doing.

 

[rjgonzo]

What happens when you shoot next and the results you see are the opposite?
Nothing you have shown is the full picture for true dispersion…
I don't base ANY results on ONE GROUP, no matter the distance.

Cheers.
P.S.
Way more shooting needs doing.

Agreed. I think I'll be able to get out on Tuesday this week. I'll post the results when I do.

 

[Mike D Texas]

At distance you will see a difference. With a standard 6.5 Creedmoor, 30 fps equates to about 7", for my load at 1000 yards, my bullets are pointed, so keep that in mind... which means I'm getting about 6% better BC out of my berger 140's. So the average Joe will see about a 10-12" drop. That's a lot of dispersion @ distance. Plus a lot of guys are using Barnes and their BC's aren't known to be in the top tier. So yes, single digits of SD should always be the goal

If you are shooting for groups, sure. But in a hunting rifle with sufficient velocity and BC to shoot animals at 1k yards, then I don't believe so.

 

[cajun]

Bryan Litz has discussed this. No way a rifle is 1 moa at 100 and 1/2 moa at 300 or what ever. Bullets do not " go to sleep" and stabilize better at distance. It's likely normal variation from a small sample size.

 

[rjgonzo]

Bryan Litz has discussed this. No way a rifle is 1 moa at 100 and 1/2 moa at 300 or what ever. Bullets do not " go to sleep" and stabilize better at distance. It's likely normal variation from a small sample size.

Thanks for the input.

 

[M118LR]

1. What happens to consistency if you back the Projectile off the lands by a thousandth or two? 2. After ten rounds and cleanings any quality barrel should be broken in. 3. Stabilisation vs overspin? Since keyholing isn't apparent, under stabilisation isn't a problem. 4. How muck tighter consistency could be achieved with another Projectile? Sometimes fitting a square peg in a round hole has consequences. 10 shot groups 10 times display the actual consistency. There shot wonders are fine if you don't expect to shoot more than three shots, but in such circumstances the consistency of the single clean cold bore is more relevant. If one shot one kill is the goal, there isn't a fouling shot involved! If a 40 round match without interruption is the goal, the most consistent 40 rounds need to be found. Great 3 round groups that are not repeatable for 40 rounds are of no use in a 40 round match. Purpose needs a little focus! JMHO.

 

[waveslayer]

If you are shooting for groups, sure. But in a hunting rifle with sufficient velocity and BC to shoot animals at 1k yards, then I don't believe so.

I see what you are saying, but why take a chance of a lower hit probability, when the stakes are higher versus a paper or steel target?. One shot one kill, i want to know my margin of error at distance, is as low as I'm capable of. Plus add in buck fever, wind, rushing a shot on an animal that's moving. So removing a large spread should be all our goals