30.06 Barnes 130gr TTSX Load

[Markez]

Good morning,

My first post!

I have been reloading for my blaser R8 30-06 for a while now and worked up a fantastic Nosler 150gr BT load, but I now need to move over to copper, and I have a rookie question that I hope you guys can help with!

Components:

Lapau Brass
Federal 210M primer
N140 powder
130gr Barnes TTSX

From reading loading data my plan is to do the following charge weights working up carefully to ensure no pressure etc.

51 grains of N140 moving up in .5 increments to around 54.5 grains.

I understand that it's a good idea to start with a 50 thou jump when doing a seating depth jump test. My question is around powder volume and the effect such a deep seating will have. Does anyone know whether I can even get to the upper end of the above powder charges at a seating depth of 50 thou?? I suppose that question gets more complicated if my rifle prefers an even deeper seating depth than 50 thou.

If anyone has any ideas on a good blaser 30.06 130gr TTSX N140 load and seating depth i would love to know!

Many thanks in advance.

Mark

 

[palmer_mike]

53.6 is max load on the Vihtavuori load data. They give a COL of 83.3mm

I’d start there

 

[stalker.308]

So I also have a blaser r8 in 30-06 and use barnes ttsx in 130grain. You do need to work up your own load, but as above max on biht website is 53.6 grains. aThat load is for tsx not ttsx, so I used the coal from the barnes data and went with 3.240 coal from barnes website. What ended up being a real sweet spot for me accuracy wise was 53grains, and not had a problem with knock down power or expansion.

Although you and I have r8's you do need to work your own load up. I am using hornady cases and cci primers.

 

[Bowland blades]

Good morning,

My first post!

I have been reloading for my blaser R8 30-06 for a while now and worked up a fantastic Nosler 150gr BT load, but I now need to move over to copper, and I have a rookie question that I hope you guys can help with!

Components:

Lapau Brass
Federal 210M primer
N140 powder
130gr Barnes TTSX

From reading loading data my plan is to do the following charge weights working up carefully to ensure no pressure etc.

51 grains of N140 moving up in .5 increments to around 54.5 grains.

I understand that it's a good idea to start with a 50 thou jump when doing a seating depth jump test. My question is around powder volume and the effect such a deep seating will have. Does anyone know whether I can even get to the upper end of the above powder charges at a seating depth of 50 thou?? I suppose that question gets more complicated if my rifle prefers an even deeper seating depth than 50 thou.

If anyone has any ideas on a good blaser 30.06 130gr TTSX N140 load and seating depth i would love to know!

Many thanks in advance.

Mark

In a hunting rifle to be used in the wet and dirt , stay away from the rifling and always load a minimum of a full caliber deep with anything. Bullets designed for hunting are made to be jump tolerant. Most Barnes ttsx work best when seated showing the very front groove sat ontop of the case neck in my experiance .

 

[Markez]

Thanks very much for your advice.

Just so I’m clear, do you ignore your CTBO measurement and just build off ‘book’ COAL instead? Seem less precise than loading lead bullets??

Thanks

 

[palmer_mike]

Thanks very much for your advice.

Just so I’m clear, do you ignore your CTBO measurement and just build off ‘book’ COAL instead? Seem less precise than loading lead bullets??

Thanks

I rarely feel the need to load at anything other than book length for hunting ammo.

It eliminates one variable from the start which is helpful and I have never failed to work up a load that is accurate enough yet.

 

[Markez]

Thanks very much for your advice.

Just so I’m clear, do you ignore your CTBO measurement and just build off ‘book’ COAL instead? Seem less precise than loading lead bullets???


Thanks

I rarely feel the need to load at anything other than book length for hunting ammo.

It eliminates one variable from the start which is helpful and I have never failed to work up a load that is accurate enough yet.

sorry if being dumb, but how does this work vs CTBO?

My CTBO is 2.736. If I build to book COAL won’t that mean the CTBO is greater and therefore the bullet nearer the lands??

Thanks

Mark

 

[palmer_mike]

Thanks very much for your advice.

Just so I’m clear, do you ignore your CTBO measurement and just build off ‘book’ COAL instead? Seem less precise than loading lead bullets???


Thanks

sorry if being dumb, but how does this work vs CTBO?

My CTBO is 2.736. If I build to book COAL won’t that mean the CTBO is greater and therefore the bullet nearer the lands??

Thanks

Mark

I’m assuming you mean CBTO (chamber base to ogive)? IE the measurement from your chamber base to the point where a bullets ogive would kiss the lands?

CIP measurement for this is 2.1835”

Seriously though it’s just easier to go with book COAL (or usually roughly 2.8”)

Not sure how you arrived at you 2.736” figure. But it’s not likely that book length would ever exceed the dimensions of your rifles chamber (provided it is within cip or salami spec)

 

[Markez]

I’m assuming you mean CBTO (chamber base to ogive)? IE the measurement from your chamber base to the point where a bullets ogive would kiss the lands?

CIP measurement for this is 2.1835”

Seriously though it’s just easier to go with book COAL (or usually roughly 2.8”)

Not sure how you arrived at you 2.736” figure. But it’s not likely that book length would ever exceed the dimensions of your rifles chamber (provided it is within cip or salami spec)

Many thanks for responding.

I used the Hornady OAL guage with a dummy cartridge to get the CBTO. The measurement I got for my 30.06 Lapau brass and a Nosler 150gr BT bullet was 2.736. I then did a jump test based on that CBTO until i found an accurate combination at 0.029 off the lands which by chance corresponds to exactly the Nosler book COAL.

My confusion with copper is that the Barnes website says i should use the same method, i.e. 'find the lands' but seat 0.50 deeper, but common guidance with copper is to build to the book max COAL. What if my finished cartridge is longer than what it would be if I used the CBTO methodology and therefore actually closer to the lands?

I'm probably making zero sense!

Thanks

Mark

 

[palmer_mike]

If you do find the lands with your ttsx and then seat 50thou deeper, what COAL does that result in? Is it anywhere near 3.240 (Barnes suggested coal)

Ps, ignore the measurements in my last post for some reason I’d reverted to .308win rather than 30-06