20 Ackley hornet barrel speed test

[mule]

I'm very lucky to have a gunsmith close an that like small calibers he had a pacnor 1-11 that didn't shoot well that we could chop up

Here my Barrel speed test out of the little 20 Ackley hornet

Started at 19.5 cut off 1 inch at a time to 16.5

Rem cases , CFE BLK @ 15grs, 32,24,26 bullets

There was some very interesting results would love to hear other people's insights for the next Barrel link test that might be done

 

[moorepower]

I am honestly surprised that there is that much dropoff!

 

[Gabe22BR]

Haven’t done one .. I try to keep my barrels long from now on…

 

[nakneker]

I'm very lucky to have a gunsmith close an that like small calibers he had a pacnor 1-11 that didn't shoot well that we could chop up

Here my Barrel speed test out of the little 20 Ackley hornet

Started at 19.5 cut off 1 inch at a time to 16.5

Rem cases , CFE BLK @ 15grs, 32,24,26 bullets

There was some very interesting results would love to hear other people's insights for the next Barrel link test that might be done

I’ve always wanted to try one. Thanks for posting.

 

[B23]

I am honestly surprised that there is that much dropoff!

I'd bet you would likely see less drop off per inch going from 24 down to 21 then the OP saw going from 19.5 to 16.5.

I took one of my factory barreled CZ 527 Varmint model 17HH's from 24 down to about 21.5 and if I recall it only lost about 35 +/- FPS.

 

[extremeaccuracy]

I'd bet you would likely see less drop off per inch going from 24 down to 21 then the OP saw going from 19.5 to 16.5.

I took one of my factory barreled CZ 527 Varmint model 17HH's from 24 down to about 21.5 and if I recall it only lost about 35 +/- FPS.

The amount of speed drop off is impacted greatly by the powders burn rate you are shooting in it combined with the bullet weight, bore and chamber size. (If you are shooting a fast powder and have burnt up 100% of the powder early in the bullets travel down the barrel you loose very little. If your burning a slow powder you need much more barrel length to get the energy out of it.) I normally find longer barrels let me fine tune them much better as I can use a much greater range of powder burn rates in them.

 

[mule]

The amount of speed drop off is impacted greatly by the powders burn rate you are shooting in it combined with the bullet weight, bore and chamber size. (If you are shooting a fast powder and have burnt up 100% of the powder early in the bullets travel down the barrel you loose very little. If your burning a slow powder you need much more barrel length to get the energy out of it.) I normally find longer barrels let me fine tune them much better as I can use a much greater range of powder burn rates in them.

Which powder are you recommend for the little hornet cases

To me look like they are all quick burning or pistol powder

 

[mule]

I'd bet you would likely see less drop off per inch going from 24 down to 21 then the OP saw going from 19.5 to 16.5.

I took one of my factory barreled CZ 527 Varmint model 17HH's from 24 down to about 21.5 and if I recall it only lost about 35 +/- FPS.

I wished it was longer but that was all he had

Still a interested test

Do you have any of you info to share

 

[mule]

I’ve always wanted to try one. Thanks for posting.

Yes sir , figure I help
It was killing me to find any info on

 

[extremeaccuracy]

Which powder are you recommend for the little hornet cases

To me look like they are all quick burning or pistol powder

Mule, It depends on which Hornet cartridge and bullet I'm trying to propel but I normally try IMR-4198, H-4198, H-322, H-335 and X-terminator on most of the Ackley Hornets I shoot. (14 Hornet, 17 Hornet, 22 Hornet) I know this is a 20 caliber Ackley Hornet but normally the powders I listed above work in even up to the 25 Hornet. I start with barrels much longer then the OP's test barrel which he said was 19.5 inches. I start my test barrels here where I usually find an accuracy node which is 26.5". (This is on Pac-Nor Super Match Barrels with the 3 land heavy groove configuration) On guns I plan to carry in the field I start at 24.5"

Which powder are you recommend for the little hornet cases

To me look like they are all quick burning or pist

Which powder are you recommend for the little hornet cases

To me look like they are all quick burning or pistol powder

Mule, it depends on which Hornet cartridge and bullet I'm trying to propel but I normally try IMR-4198, H-4198, H-322, H-335 and X-terminator on most of the Ackley Hornets I shoot. (14 Ack Hornet, 17 Ack Hornet, 22 K Hornet) I know this is a 20 caliber Ackley Hornet but normally the powders I listed above work even up to the 25 Hornet. I start with barrels much longer then the OP's test barrel which he said was 19.5 inches. I normally start my test barrels we use here at 26.5". (Pac-Nor Stainless Super Match Barrels with the 3 land heavy groove configuration). I normally find a good accuracy point on them at this cut length. On guns I plan to carry in the field I usually start at 24.5” as I usually find a good accuracy node on that length as well with the above barrel configuration.