Tuning Brocock Sniper XR Power Selector vs regulator

[dens228]

Total new guy question here as I try to get the most out of my XR Magnum.

I have the regulator set at 150 bar and had the power selector set at its highest. 

Today just to experiment I turned the power selector down one setting and got better groups with my current pellet selection. 

My question is,,,,,,

Is there a difference between using the regulator vs power selector to set the shot pressure?

Is one more efficient at achieving the same end result?

 

[L.Leon]

@dens228, your XR as you saw won't necessarily give you the best accuracy at its highest TP setting. The TP setting is for changes on the fly, as opposed to the regulator whereas your setting will affect everything else. My almost two year old Bantam arrived at 150 bar on the reg. I've been shooting it that way with the TP on its highest setting for 875 FPS with 18 grain JSBs.

 

[shoot44]

"Is there a difference between using the regulator vs power selector to set the shot pressure?" - My completely UNEDUCATED guess is that the regulator controls the pressure or force of the air getting into the shot cycle and the power selector controls the amount or volume of that air that gets thru to the pellet. 

I have an older Sniper HR magnum with the six position switch and love it. Lets me easily get a good tune for a large variety of pellets and circumstances. Also I am amazed at how "settled" the gun remains when shooting at different tunes. The combo of power regulation, hammer design and polygonal barrel they put in this gun works very well together.

I guess the reason the newer ones have fewer power selector positions is because it doesn't make much difference with the Brits and their 12fpe guns, but they should NEVER have changed it on the HP guns.



"Is one more efficient at achieving the same end result?" My GUESS is YES and that would all depend on things like - caliber - pellet -pellet weight - barrel length, temp, barometer, etc. - and a lot of that experimenting you talked about.

 

[Blackadder]

Xr sniper magnum isn't available as sub 12 fpe, it's only FAC rated. 

 

[dens228]

I'm gong to leave it as it is since I'm quite pleased with how it's shooting. Some slightly heavier domed pellets are arriving Monday and I'm thinking those will shoot better with the selector at it's highest setting. All the trial and error is quite a bit of fun and gives me the excuse to just keep on shooting.