Staball 6.5 and high velocity?

[TimberHunter]

Tried finding pressure today with 42,42.5,43,43.5 grains with 147 ELDM. No signs of pressure and velocity was 2675 fps from an 18” barrel. As a comparison I found pressure with N150 at 37 grains with a vel of 2525 fps

Referencing several books, max seems to be between 43-43.8 with a max velocity of 2725 fps with 24” barrel

So I’m only 50 fps off max vel when I should be closer to 150 fps slower since my tikka barrel is 18”. A bit concerned I’m at high pressure but not seeing any signs with my Hornady brass..?Thinking of trying a 10 round group at 42.5 since I only need around 2600 fps out of the 147

Anyone else see high velocity but no pressure signs with staball 6.5 in a 6.5 creedmoor?


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[T_Widdy]

Tried finding pressure today with 42,42.5,43,43.5 grains with 147 ELDM. No signs of pressure and velocity was 2675 fps from an 18” barrel. As a comparison I found pressure with N150 at 37 grains with a vel of 2525 fps

Referencing several books, max seems to be between 43-43.8 with a max velocity of 2725 fps with 24” barrel

So I’m only 50 fps off max vel when I should be closer to 150 fps slower since my tikka barrel is 18”. A bit concerned I’m at high pressure but not seeing any signs with my Hornady brass..?Thinking of trying a 10 round group at 42.5 since I only need around 2600 fps out of the 147

Anyone else see high velocity but no pressure signs with staball 6.5 in a 6.5 creedmoor?


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I run my 20” ctr with 42.5 gr. 147”s, alpha brass= 2615fps. I put 5 loaded at 43 gr in a glove with some hot hands, temped them at about 110° when shot. I didn’t see any pressure there either. I then did a water test and definitely have heavy bolt lift with both loads. I’ve since switched to n555 because I could never get a low sd with the staball. Im almost the same charge with n555 and only about 5 fps slower

 

[TimberHunter]

I run my 20” ctr with 42.5 gr. 147”s, alpha brass= 2615fps. I put 5 loaded at 43 gr in a glove with some hot hands, temped them at about 110° when shot. I didn’t see any pressure there either. I then did a water test and definitely have heavy bolt lift with both loads. I’ve since switched to n555 because I could never get a low sd with the staball. Im almost the same charge with n555 and only about 5 fps slower

Water test by just spraying them with some water and shooting?


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[T_Widdy]

Water test by just spraying them with some water and shooting?


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Yes just a slight mist

 

[TimberHunter]

Yes just a slight mist

Thanks I’ll give it a try


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[T_Widdy]

Thanks I’ll give it a try


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I have been loading my hunting loads to not have bolt lift when wet just in case I run into a bad situation. It seems to be around 3 grains lower than max, it’s definitely slower than I used to run.

 

[hoooogan]

Beginner shooter and reloader. I wouldn't look into the groups too much.
18" XBolt Max SPR.
3 shots each, loaded to 2.800" COAL in Norma Brass.
Hit pressure at 44.0.
Was ~40 degrees when I shot this.

 

[AZ_Hunter]

Staball 6.5 does haul ass. I use 45.5 behind a 130TMK with zero signs of pressure. I have not done the water test, but made up the load during the AZ summer, then used it on an elk in CO snow. No issues, just a dead elk. That load is 2750 (measured with both the Garmin and older chrony) out of a 16” suppressed barrel.

I also use it my 30-06 178gr ELDM load. It’s fast. It seems like a very energetic powder.

 

[seand]

Tried finding pressure today with 42,42.5,43,43.5 grains with 147 ELDM. No signs of pressure and velocity was 2675 fps from an 18” barrel. As a comparison I found pressure with N150 at 37 grains with a vel of 2525 fps

Referencing several books, max seems to be between 43-43.8 with a max velocity of 2725 fps with 24” barrel

So I’m only 50 fps off max vel when I should be closer to 150 fps slower since my tikka barrel is 18”. A bit concerned I’m at high pressure but not seeing any signs with my Hornady brass..?Thinking of trying a 10 round group at 42.5 since I only need around 2600 fps out of the 147

Anyone else see high velocity but no pressure signs with staball 6.5 in a 6.5 creedmoor?


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Your chrono reading is your pressure sign. The book velocities are pressure tested reference data. You can’t exceed the book velocities by 150fps without exceeding SAAMI max pressure.

 

[AZ_Hunter]

If you are loading longer than book data, that changes the pressure curve.