Brocock/BRK BROCOCK BANTAM CAL.25

[bigmike]

I ordered a set of these to tune my Brocock Snipers. I have not tried them yet but if your current hammer spring is not enough these may help.
I know my sniper XR can reach 46 FPE with the stock spring and 25.39 ammo.

Brocock Set of three different strength Hammer springs.

Set of the three hammer springs for the Brocock Rifles these are around the 12mm outside diameter. Photo shows the spring set, but this set ranges from medium to strong in power. These are to fit the most common size Hammer Spring that is around 12.7mm outside diameter. But if yours is different...

www.trrobb.com

It does look like your gun is shooting pretty close to what it was rated at from the factory. Looks like it is rated for a max of 785fps. with 25.39.

Brocock Bantam Hi-Lite Soft Touch .25: Airguns of Arizona

 

[joelayfield]

my "guess" is maybe you have a older gun that has a regulator that was installed , those 25 cal. bantums have a big clunky hammer thats made to pound that poppet pretty hard while its under heavy pressure , im guessing the tuning is way out , just adding a reg , isnt how you regulate a gun , : this is just my thoughts ,

 

[AirNGasman]

You have a Bantam Hi-Lite model that isn't as powerful as the (later generation) Bantam Sniper. You won't be able to get to the power level you want, due to the (5" shorter) barrel length. And whatever extra power you might coax from it will come at exponential decreases in shot counts.

To some extent, it is what it is.

 

[joelayfield]

You have a Bantam Hi-Lite model that isn't as powerful as the (later generation) Bantam Sniper. You won't be able to get to the power level you want, due to the (5" shorter) barrel length. And whatever extra power you might coax from it will come at exponential decreases in shot counts.

To some extent, it is what it is.

i have one i bought on sale and its kind of a dud , its the gun you let kids and others shoot , they are built tough ! pull that trigger and SHHHHHHHLANK its a hammer poppet crash ! its the gun i let my brother shoot , my brother is hard on everything , so the gun has a purpose !!! clank wap !

 

[AirNGasman]

i have one i bought on sale and its kind of a dud , its the gun you let kids and others shoot , they are built tough ! pull that trigger and SHHHHHHHLANK its a hammer poppet crash ! its the gun i let my brother shoot , my brother is hard on everything , so the gun has a purpose !!! clank wap !

If I recall correctly, the .25 HiLites did not use the awesome Slingshot hammer/firing system, in order to coax more power. That would explain the clank, wap.

My .22 Bantam HiLite is fantastic, as it and .177 are much better in the HiLite platform. Top rifle is my .22; bottom is a .177 I converted to pistol.

As taken from my testing notes-
.22 Brocock Bantam Hi-Lite bolt-action pre-charged pneumatic repeater

18.1gr JSB, 230 BAR* charge, 60 shot powerband= 835 862 27 4 852/29.0

18.1gr JSB, 250 BAR, hammer spring shimmed, 40 shot powerband= 859 871 12 3 865/30.1

18.1gr, 250 BAR, hammer spring shimmed, 54 shot powerband= 871 892 21 3 884/31.5

10/4/2018- Six consecutive 5 shot groups at 50 yards with 16gr. AA averaged .50” c-t-c.

6/2/2020- Four consecutive 5-shot groups at 100 yards with 18.1 JSBs averaged 1.18”.
The smallest group measured .55”; 2nd best 100 yard airgun group I’ve ever gotten.

7/2/2020- Eight consecutive 5 shot groups at 50 yards with 18.1 JSBs averaged .49”.

 

[Ezana4CE]

@AirNGasman I don’t think any Brocock Bantams in .25 caliber used the slingshot system.

 

[joelayfield]

If I recall correctly, the .25 HiLites did not use the awesome Slingshot hammer/firing system, in order to coax more power. That would explain the clank, wap.

My .22 Bantam HiLite is fantastic, as it and .177 are much better in the HiLite platform. Top rifle is my .22; bottom is a .177 I converted to pistol.

View attachment 397493

As taken from my testing notes-
.22 Brocock Bantam Hi-Lite bolt-action pre-charged pneumatic repeater

18.1gr JSB, 230 BAR* charge, 60 shot powerband= 835 862 27 4 852/29.0

18.1gr JSB, 250 BAR, hammer spring shimmed, 40 shot powerband= 859 871 12 3 865/30.1

18.1gr, 250 BAR, hammer spring shimmed, 54 shot powerband= 871 892 21 3 884/31.5

10/4/2018- Six consecutive 5 shot groups at 50 yards with 16gr. AA averaged .50” c-t-c.

6/2/2020- Four consecutive 5-shot groups at 100 yards with 18.1 JSBs averaged 1.18”.
The smallest group measured .55”; 2nd best 100 yard airgun group I’ve ever gotten.

7/2/2020- Eight consecutive 5 shot groups at 50 yards with 18.1 JSBs averaged .49”.

my XR is awsome in 22. the 25 cal non regulated is a differnt gun , the 177 and 22 regulated or not were different guns , the 25 not so good , i have them both . the 25 cal . is still ok for friends