Ladder test results

[Lead Slanger]

Check this one out. The one I shot before with the AA4350, you could see the wave. I shot this one with H4350 @ 200 yards, two shots per powder charge and couldn't tell anything. Haha. They (all but one) look the same vertically with a similar jump in velocity for each change.

19 rounds fired this trip. That brings the round count up to 65 on this barrel. Since there were no pressure signs, I'll hang around the 42 gr. mark and shoot some groups.


Howa 1500
26" Factory barrel
6.5 Creedmoor

 

[quest450]

Looks good but barrel is still young and things could change I'd try 42, 42.1 and 42.2 grains 3 shot groups to see if it repeats and how large the window is.

 

[Lead Slanger]

Looks good but barrel is still young and things could change I'd try 42, 42.1 and 42.2 grains 3 shot groups to see if it repeats and how large the window is.

Sounds like a good idea to me.

 

[Coyotefurharvester]

What bullet?

 

[Lead Slanger]

What bullet?

Hornady 140gr BTHP

 

[mikecr]

Looks like a failed version of ladder to me

 

[280ai]

Push it a little to 2750 should be the sweet spot it was in my 6.5 creed before I shot it out and went to a 6gt

 

[searcher]

I'd bet your rifle will find a different powder more suitable to bringing those in closer together. When I get shot spread like that going through a powder ladder, I switch to a different powder(s) for comparison before even trying to shoot higher-count groups. If you have an average of 1" spread on almost all loads with a powder - time to shake it up an try an alternate. Worse case, you prove you had the good one to start with. I have a .243 Winchester, as an example, that shoots most powders around 3/4" MOA, a few around 1/2 MOA. Then I tried Rel 15 and it shot under 3/8" with the entire powder ladder, putting one group under 1/10". Without trying those various powders, I'd never have found the "magic" powder. I'd not worry about round count. Good luck.

 

[JFrank]

When I look at the posted ladder, I can’t see the rifle coming into tune or going out.

two shots per powder charge and couldn't tell anything. Haha. They (all but one) look the same vertically with a similar jump in velocity for each change.

Did you use a front rest or a bipod ?

 

[Lead Slanger]

When I look at the posted ladder, I can’t see the rifle coming into tune or going out.

Did you use a front rest or a bipod ?

That's the same for me. You could see it a lot clearly with AA4350.

Front bag and rear squeeze bag.

 

[RegionRat]

Something about this recipe or the rifle is telling us that these results are not showing any tune/no-tune tendency.

If we had to pivot on these results alone, we could pick any step and have an equal chance of that step being the same as the others.

By the way, a significant number of rifles are just that outcome, meaning they really don't tune at all for a given recipe. That is not to say all rifles do this, but it is to say a significant number of rifles do not shoot tight for a given recipe.

You either try again or just pick a load 2/3 or 3/4 up the charge range and roll, or try a different recipe.

 

[CJ6]

Check this one out. The one I shot before with the AA4350, you could see the wave. I shot this one with H4350 @ 200 yards, two shots per powder charge and couldn't tell anything. Haha. They (all but one) look the same vertically with a similar jump in velocity for each change.

19 rounds fired this trip. That brings the round count up to 65 on this barrel. Since there were no pressure signs, I'll hang around the 42 gr. mark and shoot some groups.


Howa 1500
26" Factory barrel
6.5 Creedmoor

I hope you find an answer to this.
I had a Rem 6.5 Creed that would barley shoot minute of clay pigeon at 100yds with nearly 300 test rounds (factory and handloads). Put a new barrel on and it shoots great .

 

[Longrange57]

Check this one out. The one I shot before with the AA4350, you could see the wave. I shot this one with H4350 @ 200 yards, two shots per powder charge and couldn't tell anything. Haha. They (all but one) look the same vertically with a similar jump in velocity for each change.

19 rounds fired this trip. That brings the round count up to 65 on this barrel. Since there were no pressure signs, I'll hang around the 42 gr. mark and shoot some groups.


Howa 1500
26" Factory barrel
6.5 Creedmoor

Change bullets and it will probably shoot! I tried those bullets little over a year ago thinking it may be good backup bullet when others are not available in Creed, 6.5 x 47, and 6.5 x 284. On ladder tests and a few groups, was a disaster. Back to 140 hybrid....all rifles shoot! That bullet nor the new fandangled bullets that will supposedly replace Bergers might just drive a guy crazy. Checked dimensions and are not close to what I would call consistent bullets for competition.

 

[SteveUrban]

Now that you are in the ballpark with charges, do a OCW at 100 yards. That’s Optimal Charge Weight.

 

[Kracken McGraw]

Check this one out. The one I shot before with the AA4350, you could see the wave. I shot this one with H4350 @ 200 yards, two shots per powder charge and couldn't tell anything. Haha. They (all but one) look the same vertically with a similar jump in velocity for each change.

19 rounds fired this trip. That brings the round count up to 65 on this barrel. Since there were no pressure signs, I'll hang around the 42 gr. mark and shoot some groups.


Howa 1500
26" Factory barrel
6.5 Creedmoor

Is that two touching at the 42.1?. It’s hard to tell if that other is a stapler tear.

 

[Lead Slanger]

I hope you find an answer to this.
I had a Rem 6.5 Creed that would barley shoot minute of clay pigeon at 100yds with nearly 300 test rounds (factory and handloads). Put a new barrel on and it shoots great .

This one should do good. I know these are only two shots per target, but they average 5/8 MOA.

 

[Lead Slanger]

Change bullets and it will probably shoot! I tried those bullets little over a year ago thinking it may be good backup bullet when others are not available in Creed, 6.5 x 47, and 6.5 x 284. On ladder tests and a few groups, was a disaster. Back to 140 hybrid....all rifles shoot! That bullet nor the new fandangled bullets that will supposedly replace Bergers might just drive a guy crazy. Checked dimensions and are not close to what I would call consistent bullets for competition.

Someone else told me the same thing on the bullets.

I just bought some good brass the other day and I have a box of Bergers on the shelf. I'll pair them up and see what it'll do.

 

[Lead Slanger]

Is that two touching at the 42.1?. It’s hard to tell if that other is a stapler tear.

Yes. Two touching. The other is a staple tear.

 

[Doom]

Without creating a firestorm debate, OCW is primarily a rifle dynamics tuning method. Normally shot at 100yds it indicates where the barrel is pointing at the moment the bullet is released from the muzzle. Hence the search for a point of impact over various charges that have the same or very small change in POI with varying velocities. Some rifles will not be sensitive over a large range of charges. These are typically heavier, quality barrels which have very straight bores and good mounting in the stock. As @RegionRat noted this rifle appears to be one of those rifles. However only two shots leaves some question as to just how good the rifle will shoot.

Presented with this data I would recommend analyzing the data using the mean radius if you are really interested. It would reveal the actual POI of each charge and would allow overall comparison of the the combine shot distribution.

 

[Coyotefurharvester]

I thought everyone shot H4831sc in a 6.5cd.