Are there any R5M tuners available???

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sigp220

sigp220

Member
May 12, 2018
250
8
NE, United States
I'll start this by saying I'm at a lose here. I see all these folks posting amazing groups and stories about their R5M's and I can barely hit a inside a usarb bull at 32 yards. I'll try and post some pics tomorrow. One shot would hit the bull the next outside all the rings into the number square in the corner.

I've had issues before but they seem on going as far consistent shooting/grouping. My tune is Huma reg set to 120 bar, running 880-916fps in the 25 cal using JSB 25 gr pellets. I'm using the Edgunwest moderator on the recommendation that my original moderator might be clipping.

On the clipping subject I cannot believe that is what's happening, every time I make an adjustment and start shooting it's either low and right or high and right. I'm 16 clicks to the left. Just today. I verify the clicks in the reticle (Shooting off a bench). The next round will be point of aim then either high/low right. I finally stopped adjusting and started shooting groups.

I like the gun, love how it looks, love the simplicity/easy to work on. I just can not seem to get it to shot the way I expect and have seen. I'm so frustrated today I thought about selling it but I'm the honest kind of person and would have to tell the person buying it that it won't shoot. It might be I'm just having an extremely bad week and my r5m picked up my bad mojo.

Thanks is advance and any kind words would be helpful
 
Have you checked the scope and mount, or another lot of pellets?
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Have you tried single loading? The R5M is known for over rotating the mag so when you close the cocking arm to load the pellets they get shaved or damaged. That would explain inaccuracy. It’s a very poor design...
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I haven't seen that problem myself, but can see how it may happen for 3 reasons.

1. When cocking rearward very quickly the rotational inertia (worst with a full mag) may cause the mag to over rotate beyond the mag's ball detent.

2. The mag's ball detent isn't in alignment with the breach.

3. The arm rotating the mag is too long or short. If too long it can be filed down, too short warranty fix.


 
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Logical. Or, the ball detent isn’t strong enough. Or the mag rotating arm is not adjustable. Or the pellets fit too tight. Yadda, yadda, yadda. IMHO it is a poorly engineered design compared to just about every other indexing system on any other high quality Airgun. Why would the speed or quickness or technique have anything to do with a properly engineered mag system? It SHOULDN’T, but in this case it does. If you got lucky and yours actually works, then great. But there are many on AGN that will tell you theirs doesn’t always work properly. More than just one or two. I was actually told that I needed to “learn” how to cock the gun. How ridiculous is that? ;)
 
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I have a R5M in .22. When I first got it, I was not initially impressed with the groups. Now, I got it shooting at nearly an inch at 100. Barrel cleaning was the big issue for mine. I did a extremely extensive barrel cleaning. Groups tightened up.

I have a friend who has a .25 long. He had to rebuild the regulator. For some reason it was sticking open and acting like an unregulated gun.

He had an issue with the attention nut coming loose, and loosing accuracy. Then when he put it on too tight, it rested on the air tube. If the shroud touches the air tube, accuracy suffers. Check that.

Take off the shroud then shoot some groups just to make 100% sure there is no clipping.

Then take a tweezer and "tweezer load" 10 round shoot groups. If they are better, you will know it is an indexing issue. If not, like mine (group were exactly the same), you will know it is not indexing.

If you do all this, it will be either a scope or mounting issue, or a bad barrel.
 
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Much like davidsng's experience, I will say the barrel on my R5M likes to be cleaned much more often than the barrels on my old R2.5, R3, and R3M to stay consistent. My old R2.5/R3/R3M could go for thousands of pellets and never have accuracy issues, with my R5M if I don't clean the barrel every 600 pellets or so it starts throwing flyers. The cleaning intervals are getting longer the more I shoot the gun, but it's certainly more cleaning sensitive than my older Edguns.

Another thing to check-- sometimes the front barrel nut will be cranked down stupid tight... my R5M wasn't bad, but my R2.5, 2x R3, and R3M were gorilla tight out of the box. I've seen over tightened barrel nuts have a negative effect on groups, possibly because it slightly distorts the crown. I always put a bit of anti-seize on the threads and on the rear surface of the barrel nut where it contacts the moderator and then tighten it down snug, maybe 8-10 ft-lb or so... nothing crazy. I've had some guns out of the box that required putting the breech block in a vice and then using a long handled ratchet to break the barrel nut free because they were so tight, LOL. Too loose on the barrel nut can be a problem too-- since it also retains the entire outer tube and moderator assembly and keeps everything tensioned, if the barrel nut is loose the moderator tube can sag and possibly lead to baffle strikes. The gun will also be very erratic with a loose barrel nut since everything can move around.

Since you have an R5, check the moderator baffle stack for any molding flash or similar that may be hanging in the path of the pellet. It's also easy enough to remove the front cap, pull the baffle stack out, and then shoot some groups and see if it still has issues.

Magazine indexing is another thing to check, as mentioned. Pull the bolt handle back slowly and firmly all the way back until it stops, and then while slowly pushing the bolt back forwards watch and see if the magazine rotates a bit when the probe passes back through it. As mentioned, with the design of the R3M & R5M if you run the bolt too quickly the magazine can over-index from inertia, and if you don't pull the bolt back all the way the mag can under-rotate. Either way leads to shaving of the pellet when closing the bolt which will hurt accuracy.

Another thing to check... shoot over a chronograph and see if the flyers have any significant velocity deviation from the other shots; that would point to a possible hammer spring or regulator related issue.

And finally... are you using a known good scope and rings, and do you have a spare you can try? I have seen people chase all kinds of issues for days with their rifles, only to find out it was an optic issue the entire time...
 
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try the next things.

*try different pellets or another tin it might be the current one is a diff head diameter.

*clean the barrel it might be dirty (not likely)

*try a different scope(the current one might be buggered)

*try shooting it without the moderator (take that out of the equation)

*try single loading no magazine in just in case.

*shoot it from sandbags or a rest (vise just to make sure its not you, unlikely.

hope this helps please keep us updated
 
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All this info scares me into buying an R5M. I do want an excellent BULLPUP in .25 that is quiet and reliable, hope you get this issue sorted out. I also wonder if the LELYA has these same issues.
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These things a shooters does with all guns. R5M is no different. Examples, Brococks have more indexing issues with pellets from the magazine. I seen pellets shavings sitting in there breach after ever magazine. New barrels are always rough and chew up pelletd in all guns and need to be smoothed. Regulators need to be broke-in. All guns will need minor tweaks. Not all are perfect off the line for any brand.

The barrel tension nut is a unique design, but is better than having a barrel banned to the air tube. Pressure changes in a 300 bar air tube drastically effect POI, if the barrel/shroud are attached. Just need to learn the system.

I've never shot a gun accurate out of the box. Every gun gets more accurate over time.

Lelya and R5M are the same gun.
 
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All this info scares me into buying an R5M. I do want an excellent BULLPUP in .25 that is quiet and reliable, hope you get this issue sorted out. I also wonder if the LELYA has these same issues.
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My R5M is my go to gun. Not one single problem. Not entirely perfect, but show me something that is?? And so easy to service/tune. But really, if you are being scared away from it, take a look at Taipan in .25.
 
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All this info scares me into buying an R5M. I do want an excellent BULLPUP in .25 that is quiet and reliable, hope you get this issue sorted out. I also wonder if the LELYA has these same issues.
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Yea these guys have pretty much convinced me not to to buy one, as has Brian. I don’t need problems ! I really really want a R5M, I think they are the best looking bull pup, some suggest not to get one, so I look else where. Then figure ahh hell I’ll just get one, email Brian and he seems to be put out by my questions, so I take it if he don’t care for yea, service is going to be hard to come by. I still may buy one also, and just pray I don’t need to ask anything, or send back for warranty or repair. If these things didn’t cost so much, and most will need replacement parts and assistance at some time it would be an easy decision. 
 
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