is it the seals

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   I won't ditch gamo for their guns as ppl have good results with them, however as I have to assume this is how the gun is made and I can see major issues with it, I would not recommend the gamo swarm fusion 10x mag (Roadster version) to anybody. 

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 17 Aug 2022 at 2:55pm
	I won't ditch gamo for their guns as ppl have good results with them, however as I have to assume this is how the gun is made and I can see major issues with it, I would not recommend the gamo swarm fusion 10x mag (Roadster version) to anybody.

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 18 Aug 2022 at 5:37am
	May have a found a big part of the issue going thru the schematic . Part number 16080 is totally missing. It's a spacer that stops the cocking arm from moving up when breaking the barrel.(checked out motion on gun this morning) I'm now of the opinion that the end of cocking arm has been lifting into the gas cylinder body and sliding along it, pushing it up, causing the ram to lift the piston. This has corrected itself when barrel closed but caused undue pressure on piston seal, metal on metal rubbing inside of reciever and probly uneven seating of the piston when cocked. Which would explain some of the peaks and drops in chrono readings as the tolerances would allow it to tilt. Wether it's broken or worn thru and fallen out, just dropped off as its a clip,out or was never there I have no idea but I've never seen it, or noticed it on my work bench. Emailed Vaughans for one this morning for new one.

Billbobnz Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 14 Jun 2020 Location: Ashburton Status: Offline Posts: 918	Post Options Post Reply Quote Billbobnz Report Post Thanks(0) Quote Reply Posted: 18 Aug 2022 at 7:00am
	You will be surprised how good this thing shoots once you've cleaned and polished everything and removed all unnecessary movemen. I'm ordering new piston and breech seal for my Hatsan today as since the rebuild it has become inconsistent. At 40m the goruping was a vertical gorup and after a few shot through the chrony was a high of 728fps and low of 680fps, breech seal doesn't seam to be producing a tight seal. Thanks to Mercs I have all my guns barrel up so I'm going to check for lead in the cylinder. My brother in-law brought a Gamo mach 1 in .177 a couple of years ago he is shooting stoger x hollow 10.43gr pellets through it and still shooting 3/4" groups at 40m

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 18 Aug 2022 at 7:43am
	we will see. just in town now looking for 3000 grit sand paper. Can't find jb non embeding barrel cleaner anywhere. Of to repco see what valve grinding pastes they have. it's all fun. if it don't shoot well I'll turf the bloody thing.

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 18 Aug 2022 at 1:52pm
	Have to laugh at myself. Went into mitre10 with the receiver tube, poping bits of round dowl in it to find the best size. Got back cut a line down middle feed sand paper into it rolled it around started to polish air chamber. Suddenly dawned on me as I was putting the 2000 grit on, I could have brought honing tool or sand paper holder for the drill that would have taken 1/5 of time lol

Billbobnz Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 14 Jun 2020 Location: Ashburton Status: Offline Posts: 918	Post Options Post Reply Quote Billbobnz Report Post Thanks(0) Quote Reply Posted: 18 Aug 2022 at 3:39pm
	I did something similar until I brought a Brake cylinder Honing tool from repco

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 19 Aug 2022 at 6:47am
	That sounds perfect. I'm guessing your happy with the results. I've been looking into chrome polish for its abrasive qualities and it has two very soft/fine polishing compounds. I'm going to try a bit on the end of piston, clean it with solvent and see if it's smoother. If so I might do the barrel the same way. Lap it in. Probly do it after back together and tested.

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 19 Aug 2022 at 11:34am
	nope made no difference end of piston so will scrap that idea.

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 23 Aug 2022 at 11:50am
	So gun back together. Everything polished, including trigger. Everything running smooth. (better than ever has) Trigger still way to much play before engages sear so might file that back a bit more or get a longer adjustment screw. New volicitys (about 30 shots in) Everthing in 700fps. Last 2 didgets every of shot. 12,05,10,16,19,15,12,13,12,15,09,17,15,14,05,07,05,00,17,17,15,16 HI:734 LOW:700 AVG:713 Re zeroed scope. Not happy with grouping. Trigger pull may be affecting my shooting. Pellet may be to lite for 700+fps Play more tomorrow. Pellets ftt 14.66gr. Had quick shot with aa16gr not much better. Any ideas why spreading? Including shooting techniques. ( I pull much tighter groups with tx at 50m) Comments appreciated. Edited by kruzaroad - 23 Aug 2022 at 11:52am

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1662	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 23 Aug 2022 at 2:17pm
	Great thread. I haven't followed it completely, but can the red dot withstand the recoil? Have you tried it with open sights, or a solid scope to eliminate one more factor? Those speeds aren't bad, and at 25 m, I would find it difficult to shoot groups. Was there anyway to check the barrel crown? I believe this can effect accuracy quite a bit. Smack me if this has already been covered.

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 24 Aug 2022 at 2:44am
	I shot it to 15 meters with open sights and thought sweet and put scope on.(prob should have gone further) It currently has a gun City air rifle rated scope,in a one piece base, on gamo recoil damping base they come with.(red dot won't even look into till firing strait) I have no idea about the crown but will check it out on Web. That comment does make me wonder if its clipping the built in suppressor baffle. Will check that, probly remove internal baffle and see if tightens. I've seen no damage in bore but that's just looking through barrel with eye, so no noticeable damage might be better description. As for the groups if that's as good as it shoots at 25 meters, it's no good to me. I've already taken a hare with tx that had a pellet in rear leg from gamo prior to tx ( that would have been aimed as a heart shot on stationary hare) I've seen your videos and would find it hard to believe that you wouldn't be putting pellets through same hole at 25m Cheers you've given me couple more things to look at. It also came standard with a washer as spacer behind gas ram, wonder if removing that would help without dropping the power to much. hmmm

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(1) Quote Reply Posted: 24 Aug 2022 at 3:30am
	just watched a couple videos and read a heap on crowns. So yep could be an issue going to check cat trap then have a look. Have a shrouded barrel that's going to sux for checking it. But good advice pauly5.

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1662	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 24 Aug 2022 at 3:40am
	Ha ha, sorry, I really meant to say that I would find it hard to shoot good groups at 25 m with a red dot sight. slightly older eyes can struggle to focus on the close red dot and target at the same time. So if you had a scope with a fine reticule, you may find the groups tighten up, or at least you can eliminate that factor. You could try shooting into water and seeing if there are any bad looking marks from clipping? I have a 97k, and it shoots great, but when I first got it the stock screws would sometimes loosen, and this caused groups to open up, so make sure everything is tightened down positively and that the action sits comfortably in the stock. Another factor was tightening screws to the same torque each time. means the POI remained the same, but overtightening had the effect of putting a slight bend in the main tube, and effecting pellet speed from extra friction in the main tube.. I cheated in my videos, I was using a pcp.

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 24 Aug 2022 at 7:54am
	Nothing cheating about pcp. Still uses pellets and follows the same laws of drop, wind, bc. Its my job to hold the gun right so it's a steady platform,and counter the recoil. Anyway went to other end of barrel to look at crown (which was fine) but the journey to it and past it a different story. 1: Pellet scuffing to the end cap on shroud. 2: Damage to baffle inside shroud. 3:Tooling Mark running radius of rifling and grooves. Having never looked through barrel from baffel end never noticed it before. It's taken about 50 odd photos to get these and they don't do justice to how clear, crisp and deep it is. Targets shot at 25 without the baffle in to make sure it wasn't just baffle Edited by kruzaroad - 24 Aug 2022 at 8:13am

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 24 Aug 2022 at 8:09am
	Ive sent the pics to gamo distributor and asked if this could be the issue with accuracy and will gamo replace the barrel. They also put a 5mm washer behind the gas ram (as standard) which I'm probly going to take out.It reeks of a gun that has just had a spacer put in to upgrade the power and I suspect that the piston is hitting the end of cylinder harder than it should, increasing recoil and doing the seal no good. I'd rather a lower power rifle (providing its not to big a drop) that hits where its aimed more than a faster rifle that puts pellets into the rear of animals your aiming to the front of. This gun has been a major pain in the arse, but worth its weight in gold as a learning curve that's for sure.