My Tikka groups suck

[wind gypsy]

44 grains of h4350 behind a 140 is givin' er!

Looks like things are trending well.

 

[philcox]

44 grains of h4350 behind a 140 is givin' er!

Looks like things are trending well.

I might have made a clerical error. The 130 is 44.0, and the 140 was 43.0 on the H4350. But in any case, I like the groups I am getting with hunter for what I want to use it for, so happy with that. Now to go shoot

 

[AZ_Hunter]

Ok, went to the range today. Shot the following loads:

• 140 ELDM @ 42.0 RL16, 43.0 H4350, and 46.0 Hunter
• 130 TMK @ 43.0 RL16, 44.0 H4350, and 45.5 Hunter

My new LH 6.5 CM in my XLR Stock. Shot 5 of each, then the other 5 of each. All shot Lefty.

Summary: My 130 TMK over 45.5g Hunter is as good a load as I can shoot. The 140 over H4350 MIGHT be better, as I had a better group because I know I jerked on one (knew it when the shot went off, and verified on video). With that said, while that group was smaller, I like the MR and grouping on the 130 TMK over Hunter. So now I can just load up a bunch and practice. I'll use that in my NRL Hunter even too (since Skills has no Power Factor requirement).

My results:

View attachment 824275View attachment 824277View attachment 824276

Actual H4350 Velocity avg was 2920, and RL18 was 2832. I transposed them on the markup.
View attachment 824273View attachment 824272View attachment 824274

You’re good to go. Now do a 30 round group for zero.

 

[JGRaider]

I might have made a clerical error. The 130 is 44.0, and the 140 was 43.0 on the H4350. But in any case, I like the groups I am getting with hunter for what I want to use it for, so happy with that. Now to go shoot

What did your chrono say?

 

[philcox]

What did your chrono say?

• 130 TMK 44 H4350 - Avg 2920
• 130 TMK 43 RL16 - Avg 2832
• 130 TMK 45.5 Hunter - Avg 2818
• 140 ELDM 43 H4350 - 2800
• 140 ELDM 42 RL16 - 2705
• 140 ELDM 46.0 Hunter - 2800

This barrel now has 104 rounds down it.

 

[Lawnboi]

44 grains of h4350 behind a 140 is givin' er!

Looks like things are trending well.

I bet all the guns would shoot better if they weren’t pushing 70k psi.

OP, try 41.5 of h4350 and a 140.

 

[HuntHarder]

Try some Bergers out.

 

[philcox]

I bet all the guns would shoot better if they weren’t pushing 70k psi.

OP, try 41.5 of h4350 and a 140.

Was 43.0g on the 140. According to GRL that is 62056 psi, 91.8 load ratio, 100% burn out of my 21.25” barrel

I’ll give the 41.5 a try, intersting that only 99.2% burn though.


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[mddat]

GRT is good for finding a starting point but I wouldn’t fully trust what it spits out for psi, lots a variables and some powders in there are better calibrated than others, I guarantee that at 43grs with 140 eld you are over pressure

 

[Lawnboi]

Was 43.0g on the 140. According to GRL that is 62056 psi, 91.8 load ratio, 100% burn out of my 21.25” barrel

I’ll give the 41.5 a try, intersting that only 99.2% burn though.


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Regardless of what grl says 43 grains of h4350 in a 6.5cm is pushing it.

 

[Castle Rock]

My regular load in my CM is 42.5 with the 147, brass holds up fine

 

[Tanner]

41.5 of 4350 under a 140 ELDM has shot great out of several 6.5 CMs for me. I wouldn’t fire 43gr in my T3X with any hopes of using the brass again…

FWIW 41.5 over a CCI-200 is going 2630 out of my 19”. Accuracy has been excellent out to 800.

 

[pathnz]

Yet he has a theory of what causes it.

Bryan Litz explicitly does not believe in rifles shooting "tighter at longer than closer ranges". You have misunderstood or have been misled.

Bryan Litz Ballistics

These are examples of groups fired on our 100-300 yard 'shoot-thru' target. Bullets pass thru the paper at 100 yards and continue on to 300 where you see a bigger version of the same group. This...

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[TaperPin]

Bryan Litz explicitly does not believe in rifles shooting "tighter at longer than closer ranges". You have misunderstood or have been misled.

Bryan Litz Ballistics

These are examples of groups fired on our 100-300 yard 'shoot-thru' target. Bullets pass thru the paper at 100 yards and continue on to 300 where you see a bigger version of the same group. This...

www.facebook.com

I’ve heard the words out of his mouth. You should believe what you believe. I’ve seen it so nothing he or anyone else says is going to change my mind, or the minds of many experienced shooters and gunsmiths. Bullets are not all flying in perfectly straight lines. They just aren’t.

Shooting a few guns that don’t exhibit this through a double target isn't disproving anything. Honestly if he has changed his mind, it doesn’t erase the work others have done that clearly shows it. He’s very big into things having to fit his computer simulations, which I’ll never buy into as an exact representation of real world quirks.

 

[Harvey_NW]

I’ve heard the words out of his mouth. You should believe what you believe. I’ve seen it so nothing he or anyone else says is going to change my mind, or the minds of many experienced shooters and gunsmiths. Bullets are not all flying in perfectly straight lines. They just aren’t.

Shooting a few guns that don’t exhibit this through a double target isn't disproving anything. Honestly if he has changed his mind, it doesn’t erase the work others have done that clearly shows it. He’s very big into things having to fit his computer simulations, which I’ll never buy into as an exact representation of real world quirks.

He also used to believe in seating depth tuning and other traditional methods of testing. It wasn't until a couple years ago when he was subjected to some contracts that required extremely large sample testing that some of his views changed, he talked about it on a podcast. IIRC, he has an open offer for anyone that has a rifle and load that will shoot less dispersion at a farther distance than it does shorter, and no one has taken him up on it. Because you may have seen it happen with your own eyes, but I would be willing to bet it wasn't with valid samples. For it to be true, it has to be repeatable. This is where those claims typically fall short.

 

[khuber84]

The people that shoot smaller groups at 400y VS 100y prob have parallax errors going on......