Brocock/BRK BRK Pathfinder .22 Cal Velocity Question

[longdog]

I bought a used Pathfinder 5-6 weeks ago. It's a great gun shoots 18gr AAs fairly accurately. I carry it in my truck most of the time.
Yesterday I had a chance to run it over a chronograph for the first time. I expected velocity of the 18gr AAs to be something above 800fps. Velocity is actually 745fps with a fps spread of 9fps on 40 shots with these pellets.
Regulator is set at 147bar(I raised it from the 125bar that the original owner had it set at).
The original owner also played with the hammer spring tension, but I adjusted it to 97% of the max velocity which turns out to be 745fps.(velocity with hammer spring tension adjusted for max velocity is 770fps)

My question is....what should the max velocity be on a totally stock Pathfinder using 18gr AAs?
745fps with these pellets might be just right, but I thought is would be over 800fps.
It does shoot 14.3gr CPHPs at just over 800fps.

Oh, and I replaced the breech seal just in case.....you never know if the previous owner of a used gun might have accidentally fired it with the breech open.
Thanks in advance for sharing your knowledge!
Norris

 

[L.Leon]

Four, ten shot strings through Pathfinder XR

Please be mindful that these are simply my first shot strings out of this gun. So the numbers may change. I sent 10 Crosman Premier Hollowpoints at all three TP settings. And one string with JSB Exact Jumbo 18s, TP on high. I’ve done nothing to this gun, just unboxed, scoped it and started shooting.



CPHPs / TP High

Hi: 846 Low: 835 Avg: 841	Std: 3 ES: 11 FPE: 22.4

CPHPs / TP Med

Hi: 836 Low: 829 Avg: 834	Std: 2.27 ES: 7 FPE: 22

CPHPs / TP Low

Hi: 794. Low: 784 Avg: 789	Std: 3.36 ES: 10 FPE: 19.7

JSB Exact Jumbo 18s/ TP High

Hi: 794 Low: 782 Avg: 788	Std: 4.94 ES: 12 FPE: 24.8

 

[longdog]

I forgot to mention that I have my TP on high.
My numbers are considerably lower than yours. That is what I suspected.
It shoots fine and I really like the gun for my purposes...it's easy to handle in the truck!
I might call AOA just to see what they say.

 

[Joedirt199]

Does it have hammer spring adjustment or hammer throw adjustment? Could try bumping one of those up till the velocity maxes out, then back it off slightly. That will give you roughly 95% of your max velocity at that reg pressure.

 

[longdog]

I adjusted the hammer spring tension, but they don't have a hammer throw adjustment like a Marauder.

Edit: The Pathfinder does actually have a hammer throw adjustment and it's easy to adjust.

 

[L.Leon]

I forgot to mention that I have my TP on high.
My numbers are considerably lower than yours. That is what I suspected.
It shoots fine and I really like the gun for my purposes...it's easy to handle in the truck!
I might call AOA just to see what they say.

Forgot to mention these strings were sent outdoors in July.

 

[ArbabAmjad]

What are the post accurate pellets for .22 Pathfinder?

 

[longdog]

Mine shoots 16g JTSs at 810fps and they are very accurate.

 

[ArbabAmjad]

Mine shoots 16g JTSs at 810fps and they are very accurate.

Thanks! Do you mean JSB Jumbo Exact Diablo, 15.89G ? Also any changes to regulator or hammer? or is it all factory?

 

[longdog]

Thanks! Do you mean JSB Jumbo Exact Diablo, 15.89G ? Also any changes to regulator or hammer? or is it all factory?

No. I'm no longer a fan of the JBS branded pellets. They seem to now have a lot of casting flaws.
JTS 16s are my go to .22 pellets for my Pathfinder.
My regulator is set at 150bar. 150 is the factory setting although I have messed with the regulator settings from 120bar - 160 bar. Settled back at 150bar.
I have played with the hammer spring tension and the hammer throw a bit.

 

[ArbabAmjad]

Mine shoots 16g JTSs at 810fps and they are very accurate.

Is it accurate till 50 yards? Less or more?
Also what's your regular and hammer settings? Thanks!

 

[Solo1]

Just got mine today. 150 bar reg 18’s 785 fps. 15’s. 807. 14’s840. No idea where hammer spring is. Is it even adjustable? Oh they were all jsb

 

[ArbabAmjad]

Just got mine today. 150 bar reg 18’s 785 fps. 15’s. 807. 14’s840. No idea where hammer spring is. Is it even adjustable? Oh they were all jsb

I also got one few days back from AoA. I am getting similar FPS. I am seeing good accuracy at 25 yards but struggling to get same at 50 yards. Haven't changed anything on gun yet. How is accuracy looking for you?
Hammer adjuster is hiding in the stock. When you fold the stock you can see it.

 

[Solo1]

I also got one few days back from AoA. I am getting similar FPS. I am seeing good accuracy at 25 yards but struggling to get same at 50 yards. Haven't changed anything on gun yet. How is accuracy looking for you?
Hammer adjuster is hiding in the stock. When you fold the stock you can see it.

I haven’t been outside yet. Ups showed up around 2 and by the time i got the scope on cronoed it and sighted in close it was dark

 

[L.Leon]

Just got mine today. 150 bar reg 18’s 785 fps. 15’s. 807. 14’s840. No idea where hammer spring is. Is it even adjustable? Oh they were all jsb

Your numbers with the 18s and 14s matches the number of my “stock” setup, right out the box. I posted numbers above…

I also got one few days back from AoA. I am getting similar FPS. I am seeing good accuracy at 25 yards but struggling to get same at 50 yards. Haven't changed anything on gun yet. How is accuracy looking for you?
Hammer adjuster is hiding in the stock. When you fold the stock you can see it.

When I do my part, in good conditions, dime size or smaller 5 shot groups sending JSB Exact Jumbo 18s at 40 yards. At 50 yards from 1/2-3/4”. I am not a bench shooter and the Pathfinder though very capable is a plinker/pester for me; where only the first shot counts… Some examples of when “I’m“ on point, the gun is more capable than I am.

 

[Solo1]

I spent some time fartin with mine changed the grip , much better, put a strip of gorilla tape centred down the buffer tube to tighten up the stock and put some 1/4” foam thats stiff on the cheek rest as i used a compact scope and needed higher rings for the bell to clear the pic rail

 

[longdog]

Is it accurate till 50 yards? Less or more?
Also what's your regular and hammer settings? Thanks!

My reg setting is 150bar. I can measure my HS setting from flush. My hammer throw is stock.(I have played with the HT a bit but it didn’t make much difference)
I spoke to Chris at AOA about the hammer throw changes but he too agreed that it doesn’t change velocities much at all.
I only have 43yrds to play with in my backyard range. I can easily stay within an inch with the 16.08 JTSs on a calm day.
30yrds it will do 1/2 to 3/4” all day long.