Huge Diff. In Wind between .22 MRD 25.4’s and FX Hybrid Slugs

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RadarMan

Member
Oct 15, 2022
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Palm Beach, Florida, USA
I Have to believe that I didn‘t have my .22 MRD’s going Fast Enough this past weekend… Wind was really pronounced 15 mph, variable and gusty. A very Bad day for hoping to achieve any consistency with an air rifle.

Tried shooting 1st time at 100 yds anyways with new Crown Mk II / 600mm rifle. Reg was at 135 Bar., TX Port Large and Hammer at 18-19 (after setting cam for max travel) was slinging the MRD’s at 910 fps. Dial on 23 was only into 930ish. Rifle was Also shooting the FX Hybrid 22gr Slugs at the Same Velocity per dial as the MRD’s. I was able to select Trans. Port in Medium and dial down to 5-6 for about 900 fps for Exact Hvy 18.1’s.

Results were that the 18.1 Exacts held about 3-4 Inches on a little steel plate at 100y. I was figuring that the MRD pellet was going to blow the little ones way…but No Way. Those redesigns going 905-910 fps were a Disaster in the winds. Terrible 5-6 Inch grouping with even some Missed Shots!! Just awfully Bad.

Real Display of just How Good & Impressive the Ballistic Coefficient of those FX Hybrid Slugs in 22 gr. came when trying them on a whim at the Same 905-910 fps at same steel disc at 100 yds. My God did they fly well in those bad, shifty Winds! Of 5 shot in one string 4 of them all piled into about 1 Inch and the 5th was only another 1/2 - 3/4 away.

I have literally Not even shot 400 pellets or 30 slugs through this gun yet and I am just loving the intimate association with building and observing its accuracy and behaviors with different Ammo and Velocities. This has got to be the Ultimate rig for gun loving fiddler types (if you don’t want the chassis configuration of the other “super-gun” they make.)

I think will go up to 145 on Reg. and try to get to 950-960 with those MRD’s in the 600mm Superior Pellet Liner. I won’t be chasing them beyond that I dont think.

Again, though, just Flabbergasted at how Straight those FX Hybrids flew down that blustery 100 yd range with all the bushes around swaying and bending to arrive at a 1” cluster of 4 hits. Impressive. Bet I would have had a difficult time trying to do that with a bolt action .22 shooting some hi-grade Eley…

Any helpful input in the MRD .22’s in 25.4 grain encouraged. (Or other comments in general of course.)
 
I’ve been going down the MRD rabbit hole with an impact — same barrel liner as you 600mm

no success at 100 yds — currently have the gun turned up to hurl the MRD at 1000+ fps just to see what happens. I don’t expect to stay at these settings unless something magical happens. shot count per fill sucks

here is my thread if you want to see the groups...

Impact M3 — 1st time with 25.4 grn pellets

So I’ve had an M3 for a few months now. Been shooting 15,18, and Hades jsb pellets. awesome accuracy with the hades at 50 yards. Decided to turn the gun up and get the fx 25.4 grn pellets moving and give them a try. 1st reg at 160ish 2nd reg at 140-145 macro at 14 Micro just a tad over 4.5...
www.airgunnation.com www.airgunnation.com
 
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I am interested to see what others have to Say about the MRD’s at distance. I shot them out of my Maverick Sniper at speeds from 850-980. Velocity did not seem to matter much. They never shot well past about 70 yards and in the wind they were worse. I dropped them and went to 27.5 gr NSA’s. Those shot to 1 1/4” at 100 yards with a slight quartering away wind.
If somebody has a formula that works for the MRD’s I will be all ears.
 
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Yikes… That is Not an encouraging thread that you directed me to Heavyopp. I Thank You very much for filling in your experience so far.

I’m thinking I may just leave the MRD at being a 50-60 yard pellet rather than wiping out my bottle shot-count to chase 1 pellet.

Although they are expensive (ha-ha, what were we thinking When we put down the $$ for these hi end PCP’s) I may just move to those 22 gr. Hybrid Slugs for 100 Yd shooting. I can’t wait to see what they are capable of when the conditions are Calm.
 
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I have been shooting 25.4 gr MRDs for some time and have been happy with their performance.
Just today tried a few FX hybrid slugs.
I did not chronograph them. Just did a few test shots at 50 yards and my initial impression is good.
Nice tight groups on paper targets, and they seem to hit with some authority.
I need to see how they do at 100 yards and farther.
 
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@RadarMan, I too just picked up a bar and new crown, and like you, I tried the heavy 25.4 grain pellets (I picked up a tin of the FX. Version so not sure if they’re redesigns or not). My issue so far out to 70 wasn’t accuracy, but inconsistency. I’ve been chasing crazy sd numbers with my tune on these, and can’t get it to tighten up. When I tuned it for 18 grain pellets, the sd was under 2fps, so I’m pretty sure it’s not the gun. Wondering if maybe this caused the issues at 100yds people are having. Has anyone weighed and sized these pellets to see how consistent they are?
 
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Here are 3 power-curve graphs attached that I cooked-up using the Pellets and Slug mentioned in original post above. These are super easy to make by populating a shot string into an excel file and then just asking program to make a line graph out of the selected cells. I think It really helps to visualize what is going on as you adjust the hammer spring knob in various Reg. Settings, Pellet selections, etc.

I'm certainly interested to hear Any Comments or "Coaching" an how these curves look from the gang here.

Steve D. in FL waiting for my next Hurricane to arrive on the front door tomorrow evening :-( Hopefully it only arrives as a Tropical Storm. These things are SUCH a pain in the A@$

View attachment Tune 11-1-22.pdf
 
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a
RadarMan said:
Here are 3 power-curve graphs attached that I cooked-up using the Pellets and Slug mentioned in original post above. These are super easy to make by populating a shot string into an excel file and then just asking program to make a line graph out of the selected cells. I think It really helps to visualize what is going on as you adjust the hammer spring knob in various Reg. Settings, Pellet selections, etc.

I'm certainly interested to hear Any Comments or "Coaching" an how these curves look from the gang here.

Steve D. in FL waiting for my next Hurricane to arrive on the front door tomorrow evening :-( Hopefully it only arrives as a Tropical Storm. These things are SUCH a pain in the A@$

View attachment 303892
Click to expand...
thanks for that info. Do you have any shot string info with e 25.39 consistency between shots?
 
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gendoc said:
thats why i shoot the hybrids in my 600mm crown mk2, i can put 7 in 1-moa @ 100yrds
using windage calcs when its needed.
pest birds around my grain silo's are at risk ! 👨‍🌾
Click to expand...
Just a shame they cost so much!
I’m hoping to shoot the NSA 20.2 and 23 grain offerings just based on price. I hope they’re as accurate as people are saying the hybrids are.
 
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madeintheuk said:
Just a shame they cost so much!
I’m hoping to shoot the NSA 20.2 and 23 grain offerings just based on price. I hope they’re as accurate as people are saying the hybrids are.
Click to expand...
i really hope they are for you......they were not from my superior liner.
i wish they were because i had hundreds of each, but that didnt work out.
maybe your results are better. good luck :)
 
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gendoc said:
i really hope they are for you......they were not from my superior liner.
i wish they were because i had hundreds of each, but that didnt work out.
maybe your results are better. good luck :)
Click to expand...
What diameter did you have? I was going for .217. I have some 23g .218, and they’re not very accurate at all.
 
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.217 NSA 23 grain slugs out of superior liners are……..
1667968154869.png
 
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Hi qball, I'm interested in what "madeintheuk" asks too...:)

- Is Your Liner a Superior Pellet liner or a Superior SLUG liner?
- How Fast are you pushing those 23gr NSA's to achieve your "Frickin' Laser Beam" performance? (chuckle-chuckle)

I'd really like to find a Slug about that weight that doesn't cost $0.14 Each... (That would be $45.00 for 325 of!!) Kind of stiff. I do think those .22 Hybrids are pretty Slick at the 930 fps and 600mm Superior Pellet liner combination, but would like similar or better performance for Less $.

$20.00 for 325 of them is More Like It...

Standing By for Wisdom and Thanks!, Steve
 
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RadarMan said:
Hi qball, I'm interested in what "madeintheuk" asks too...:)

- Is Your Liner a Superior Pellet liner or a Superior SLUG liner?
- How Fast are you pushing those 23gr NSA's to achieve your "Frickin' Laser Beam" performance? (chuckle-chuckle)

I'd really like to find a Slug about that weight that doesn't cost $0.14 Each... (That would be $45.00 for 325 of!!) Kind of stiff. I do think those .22 Hybrids are pretty Slick at the 930 fps and 600mm Superior Pellet liner combination, but would like similar or better performance for Less $.

$20.00 for 325 of them is More Like It...

Standing By for Wisdom and Thanks!, Steve
Click to expand...


Superior liner shooting them at just about any speed, I have shot at low as 760 fps and still shot fine. Speed is not a direct indicator nor requirement for slug accuracy.

Slugs are spin stabilized, while the spin is result of traversing rifling at speed but enough spin is enough spin. Notice a spin top can be very stabile at 0 fps given enough spin. Superior liners have enough twist rate for lighter slugs under 25 grain even at lower speed. The important part is the tune which has to be very efficient or the muzzle blast will destabilize the slug after it leave the barrel. This is no different than calculating the spin rate, finding the right twist rate for the ammo and load development in PB world.

I only shoot NSA slugs for many reasons you have listed.
 
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