Thread: .270 or 25-06

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 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 R93

What velocity?



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I used the max velocity quoted for each cartridge in the ADI manual for a 24" barrel. I realize that each one may be able to be pushed faster, but I was trying to get a reasonable comparison.

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

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 PerazziSC3

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...

Check the case capacities.

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

Originally Posted by Gibo

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

50

Originally Posted by Toby

50

Ok should have narrowed that down to one thats practical for jo average

Is 25-06 a barrel burner?

Have used both. More recently bought a 270 and can't fault it mate. Yeah sure if you're target shooting then go buy a .338 or some hella big cal but for hunting medium/big game in NZ I can not fault the 270. Nice and flat, enough punch in the round to drop ANYTHING in hits and a huge range available in NZ. The ammo isn't horrendously expensive either. Every cal has is pros and cons but you asked our experiences and mine have been that it is robust and hard to fault in the field.


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