Factory Ammo for .270 Win. with 1:10 barrel Twist

[AIM STR8]

Could someone tell me if there is any correlation to muzzle velocity and barrel twist?
In other words if my .270 has 1:10 twist would it shoot better with sub 3k fps?
I don't hand load and rely on factory ammo. I still like to try different ammo and was wondering if there are things to watch for.

Thanks for any input.

 

[Darkside]

You are good to go with any factory ammo up to 150gr. Now the all copper bullets are a little different, the heavier weight may need a faster twist.
130 to 140 Accubond and BT are good for anything from whitetail to Elk. And Federal Fusion is a good choice.
Hope this helps.

 

[AIM STR8]

You are good to go with any factory ammo up to 150gr. Now the all copper bullets are a little different, the heavier weight may need a faster twist.
130 to 140 Accubond and BT are good for anything from whitetail to Elk. And Federal Fusion is a good choice.
Hope this helps.

Do you know what affect the muzzle velocity has on the different weights? I see some ammo with same weight bullets but have different MZ

 

[Sheltowee]

Handy dandy calculator: https://bergerbullets.com/twist-rate-calculator/

 

[Walkathon]

Just my experience, but I've had good luck with Hornady factory ammo. 140 Gr Interlocks shoot well out of my Tikka .270 and I've shot a bunch of deer with the bullets and had great results.

 

[mevertsen]

Do you know what affect the muzzle velocity has on the different weights? I see some ammo with same weight bullets but have different MZ

It just depends on the manufacturer powder used with what type bullet amd what the results were in their test firearms.

Only way to know is to find a load that works in your gun and test the drops at known distance to extrapolate the velocity, or get a chronograph.

 

[Darkside]

It just depends on the manufacturer powder used with what type bullet amd what the results were in their test firearms.

Only way to know is to find a load that works in your gun and test the drops at known distance to extrapolate the velocity, or get a chronograph.

THIS^^^^^^^^^^^^^^^^^^

 

[AIM STR8]

Thanks fellas .... I feel a little smarter now

 

[Wind Gypsy]

To generalize, no it doesn't matter. In faster twist rates you can spin a bullet too fast to the point of where jacket failure is possible or likely but would have to be way faster than 3000 FPS with a 10 twist.

 

[elkduds]

My 1/10 .270 was accurate w 160g NPs, if you like a bit more penetration on larger game.

 

[Benfromalbuquerque]

MV on factory ammo is perfect synthesized conditions through a 24” barrel. I’m assuming hunting is the application here. Elevation and humidity have impact on zero so sight in where you hunt. Coastal Georgia zero is not Bitterroot zero. I’d say zero 3” high at 100yd. Then put one downrange at 300yd, see your drop and go get some.

 

[Cap’n Crunch]

I have used a 270 only and exclusively for the last 44 years and have found this to be the best scenario for me.

IMO if you choose to sight in at 200 yards, you can use a ballistic calculator to determine the exact trajectory and adjust your scope accordingly. For example, with a 130-grain bullet, you might find that a 200-yard zero will keep the bullet within a few inches of point of aim from 100 to 250 yards, which is ideal for most hunting situations.

By sighting in at 200 yards, you can also avoid the steep bullet drop that occurs beyond 300 yards, which can make long-range shots more challenging and less accurate. This approach simplifies your shooting and ensures that you can make accurate shots within the typical hunting range without needing to adjust for bullet drop.