Ammo speed BS ?

[S-3 ranch]

Do the ammunition manufacturers just pull the speed on the box out of a donkeys A hole
I have bought 3 different brands and zero have made advertised 3060+ fps
Most are running +/- 2900 FPS with 130gr .270win mostly lesser than
Benchmarks just seem like total garbage on the box

 

[NeedleCrook]

I’m sure it’s ideal condition with a 26 inch barrel and even that’s probably Max not average.

 

[pods8 (Rugged Stitching)]

Do you have a 24-26" barrel on your gun?

 

[jimh406]

There are actually quite a few variables. Elevation, temperature, barrel type, chambering, length, type of rifling, how clean the barrel is, etc.

There are a few people that regularly test ammo on YouTube. You can check one/more of those and see what they are getting.

 

[S-3 ranch]

Do you have a 24-26" barrel on your gun?

No , unfortunately Winchester back in the 50’s put a 22” on a featherweight
Now days some are 20” which is worse for .243 & 270 imo

 

[pods8 (Rugged Stitching)]

No , unfortunately Winchester back in the 50’s put a 22” on a featherweight
Now days some are 20” which is worse for .243 & 270 imo

24-26" are the common lengths of velocity test barrels. Many cartridges loose at least 25fps per inch (even more when getting into short barrels and less with longer barrels) and some can loose closer to 50fps depending on the powder and ammo combination.

Then you get into faster/slower barrels, etc. so frankly a shorter barrel gun getting 150fps less than the box advertised doesn't seem grossly out of line.

 

[Reburn]

I bet you got a slow barrel that is exacerbated by the velocity loss due to length.

 

[hereinaz]

So many asterisks for box velocity... but, yeah, I am sure that they fudge the velocity. Frankly, box velocity is one of the many things that I view with a hefty dose of skepticism.