A big thanks to Motorhead Tuning Services for newly tuned DS Regal .22

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tommyb

tommyb

Member
Feb 20, 2018
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North Carolina, United States
 

Hi gang,

I wanted to send out a nice big "shout out" to Scott ( Motorhead Tuning Services ) for completing a recent tune of my one year old Daystate Huntsman Regal XL .22 caliber air gun. I debated back and forth about whether or not to sell my unregulated Regal or buy a new one with a HUMA regulator. As it turns out, I decided to keep my gun and have Scott install a new HUMA, lap the barrel, adjust trigger to about 10-12 oz of pull, install a sling stud for a Harris 6X9" bipod, lube the bolt to make it a bit easier to cock, adjust the power down a bit, replace all the O-rings, etc. Scott can embellish here too if I miss anything.

I took the gun to my local outdoor range yesterday and was pretty happy with the results. I posted some pics of my groups. Shot about 20 (5-shot ) groups of JSB 15.89, 18.1 and 14.3 grain .22 caliber bullets. I didn't wash or lube the pellets for this exercise, but I normally will do that when I shoot at 50 yards or longer. I believe Scott tuned my Regal with the JSB 15.89 so it can shoot about 810-820 FPS ( around 70 shots with his Chrono as I recall ), but he can add context to this post if he is reading and following. I get about 40 shots on the Regulator, which is set to around 132 BAR threshold. I have not Chrono'd the gun, but will soon as my friends show up with their LAB Radar next time I see them. 

I shot at 25, 38 and 52 yards with a wind of approximately 5-10 mph. The Regal shot very well at 25 yards as I was expecting and hoping, but it also did very well at 38 and 52 yards for me anyway. I shoot with a back Caldwell rest and a front bipod off the bench with a Sightron scope. To say I am happy with the "renewed" DS Regal is an understatement. Scott was patient with all my questions, explained a lot of what he/we were trying to do with the tune and I have the utmost respect for his knowledge and his abilities.

I use this gun for back yard pest control for squirrels mainly and for outdoor target range shooting. I know I can do better with the Regal with a little less wind and better technique, but I am very pleased with the improved accuracy and results. My hope is to get these 5-shot groups to a consistent 1/2 inch or less, and I wouldn't complain if I shot a 5-shot hole in hole group once in a while, which has been very illusive for me at 50 yards. I can sometimes put two or three in the same hole, but then the group spreads out if I shoot 5 shots. I cannot believe how incredibly hard it is to shoot a pellet hole in hole with 5 consecutive shots, have never done it yet at 50 yards. I will keep at it though!

If anyone is interested in tuning their Regal, Scott is the man and knows these guns inside and out. Thanks Scott!

Tom













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Thank you for the Kudo's ...

Some may feel speed in the lower 800's is less accurate than set at upper 800's where many sporting guns shoot. When asked where the optimum accuracy lye's ?

When someone wants to punch paper for score and not kill game .... we slow it down a bit getting less wind drift and a drop down from the trans-sonic threshold a bit more buys us a bit of stability too.

As those who own REGAL's ... itty bitty air tanks !!! and while you can muscle up the power, it kills shot count very quickly.



In regulation converting these there modified / set up in such a way that the valves internal space in increased providing the required plenum space for a modest power tune, yet if one wants MORE power the regulator can be spaced off the valve increasing plenum volume. ( This within the range of vent hole as it sits between o-rings ) Not done with a fixed plenum venting threw the threads as many do.

Anywho ... Some damn fine shooting right there !



Scott S
 
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Scott did a similar tune on my Regal, excellent work. I have since sold the rifle, but that's another story, and probably a mistake. And I agree that most US shooters are too focused on speed. I guess it's the typical American view that bigger and faster is always better. My RAW .22 shoots the JSB 16 at around 880, and it's very accurate. It shoots the 18 around 840, and just as accurate. I can't get much more out of it without increasing the reg pressure, so I think I'll leave it alone. IMO, Scott's perspective of accuracy vs. velocity is correct. If you can obtain equal "best" results at a lower speed, do so and get the benefit of an increased shot count. Given the relatively small air capacity of cylinder rifles like the Regal, every little bit helps. A bit more elevation compensation is not a big deal. 
 
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Hey guys, 

This is probably the best explanation I have seen for pellets and shooting different velocities, vs. bullets or slugs. Scott sent me a personal email response to a question I had about the tune for a bit slower FPS and why we chose that route. I was specifically asking why we tuned the Regal down a bit of power vs. tuning at a higher FPS. 

Take a look, it's worth a good read....This all makes sense to me now that I understand the explanation.

Ultimate accuracy is based upon stability of the projectile. Pellets like bullets are spun via a barrels rifling twist. Unfortunately pellets are a LOT draggier passing threw the air than bullets are. * By design pellets are DRAG stabilized. Faster ANY projectile is shot, higher is the RPM said projectile spins at as it heads towards intended target. It is a proven fact that while a pellet slows down exponentially slower further away if flies, the ratio of forward motion speed loss IS NOT equal to the loss of RPM. Therefor a faster shot pellet will be spinning at a higher RPM than one slower, yet due to a pellet being so draggy the retained RPM of faster initial shot will destabilize the pellet further it go's down range.



Where as a slower initial slower shot pellet will have less spin RPM, at equal range it too will be slower but the RPM it is spinning in less and not as prone to destabilize it.



All these drag issues are well documented and will not get into the cause & effect further. It is a FACT that shooting a Drag Stabilized Diablo shaped pellet shooting at long distances really is beyond the intended design parameters of the projectiles shape. Read what you will on the web and take what's read with a grain of salt ! Want super tight groups at distance with an air weapon ... SHOOT BULLETS !



Scott






 
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