Thread: .270 or 25-06

Originally Posted by Tahr

Isn't that obvious? I didn't have a computer.

Neither did I hence stuck on 308

Originally Posted by Danny

Most 6.5's I've seen used have performed adequately at best and averagely at worse.

No shit that's probably the first time in my life I have seen this being stated.

Just to baffle all of us with ballistics.....I ran some numbers thru JBM, mainly coz I was interested as I'm looking at building something based on a 30-06.....

I compared high BC Hornady pills (as that is what I'll be using) and used max velocity's out of the ADI manual.

I compared them at 600m, and then looked at what range the bullet dropped below 600ft/lbs or 30 MOA as a max range. All were 200m zero. 10 mph crosswind. Drop and drift measured in MOA.

25-06, 117SST, Drop= 12.8, Drift= 6.1 Energy= 709 Max range 680m
6.5-06 140 amax, Drop= 11.9 Drift= 4.2 Energy= 1124 Max range 950m
.270 150 SST Drop=13.1 Drift= 4.7 Energy= 1058 Max range 900m
.280 162 Amax Drop= 13.7 Drift= 4.1 Energy= 1184 Max range 920m
.308 168 Amax Drop= 16.3 Drift= 6.0 Energy= 890 Max range 800m
30-06 208 Amax Drop= 14.7 Drift= 4.2 Energy= 1435 Max range 900m

Interesting........

Originally Posted by Toby

No shit that's probably the first time in my life I have seen this being stated.

Same! Have not had one that long but wish I changed sooner than I did.



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Originally Posted by sniper80

Just to baffle all of us with ballistics.....I ran some numbers thru JBM, mainly coz I was interested as I'm looking at building something based on a 30-06.....

I compared high BC Hornady pills (as that is what I'll be using) and used max velocity's out of the ADI manual.

I compared them at 600m, and then looked at what range the bullet dropped below 600ft/lbs or 30 MOA as a max range. All were 200m zero. 10 mph crosswind. Drop and drift measured in MOA.

25-06, 117SST, Drop= 12.8, Drift= 6.1 Energy= 709 Max range 680m
6.5-06 140 amax, Drop= 11.9 Drift= 4.2 Energy= 1124 Max range 950m
.270 150 SST Drop=13.1 Drift= 4.7 Energy= 1058 Max range 900m
.280 162 Amax Drop= 13.7 Drift= 4.1 Energy= 1184 Max range 920m
.308 168 Amax Drop= 16.3 Drift= 6.0 Energy= 890 Max range 800m
30-06 208 Amax Drop= 14.7 Drift= 4.2 Energy= 1435 Max range 900m

Interesting........

What velocity?



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Originally Posted by sniper80

Just to baffle all of us with ballistics.....I ran some numbers thru JBM, mainly coz I was interested as I'm looking at building something based on a 30-06.....

I compared high BC Hornady pills (as that is what I'll be using) and used max velocity's out of the ADI manual.

I compared them at 600m, and then looked at what range the bullet dropped below 600ft/lbs or 30 MOA as a max range. All were 200m zero. 10 mph crosswind. Drop and drift measured in MOA.

25-06, 117SST, Drop= 12.8, Drift= 6.1 Energy= 709 Max range 680m
6.5-06 140 amax, Drop= 11.9 Drift= 4.2 Energy= 1124 Max range 950m
.270 150 SST Drop=13.1 Drift= 4.7 Energy= 1058 Max range 900m
.280 162 Amax Drop= 13.7 Drift= 4.1 Energy= 1184 Max range 920m
.308 168 Amax Drop= 16.3 Drift= 6.0 Energy= 890 Max range 800m
30-06 208 Amax Drop= 14.7 Drift= 4.2 Energy= 1435 Max range 900m

Interesting........

I'm guessing the 6.5 hit the deer and killed it while the other projectiles shot the deer in the
Toe

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You need an ant-acid for the wind!

Classic. As good as a bit of cricket on a Sunday arvo.


Dan M

Why would someone buy a new 270 or 25-06 when a 280 or 30-06 would do everything thing as good if not better for the same $$.

Originally Posted by PerazziSC3

Why would someone buy a new 270 or 25-06 when a 280 or 30-06 would do everything thing as good if not better for the same $$.

Because if we all had the same cal noone could have these awesome discussions

Originally Posted by Danny

Most 6.5's I've seen used have performed adequately at best and averagely at worse.
The 25.06 is a cartridge that has always made me curious.
The 280? Nope. Why would it...? No reason it would.
More powder for nothing.
Dan M

I like adequate, adequate implies job done, no fuss, without it beating the crap out of me.

Originally Posted by Beavis

Compare a 162gr A max to a common .277 bullet. Try 150gr SST or Berger to even out the odds.

As I said. I wanted to compare apples with apples. The 280 hardly has the powder capacity to make a 160gn+ projectile worth it.

I haven't looked at data but I would imagine a 162grain from a 280 would be pushed at the same speed as a 150grain from the 270 at the same pressures. Same speed, better bc = more energy and less wind drift...

Originally Posted by Shearer

As I said. I wanted to compare apples with apples. The 280 hardly has the powder capacity to make a 160gn+ projectile worth it.

True but you wouldn't pic the shittest apples in the bunch... I'm pretty sure an A max spat out a 280 would be more than capable. A helluva lot more exciting than what .270 offers anyway. Your view may differ.

Out of curiosity, what is the best cal and projectile with best bc?