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philrob2000
26-11-2006, 02:31 PM
First ever attempt at writing a review ( or anything else useful for that matter. :o ) So bare with me and excuse the spelling in advance. ;) (too much time on my hands these days).

SMK XS78.
First Impressions.

Woodwork.

Right. Upon opening the box I was pleasantly suprised to see that the stock isn't covered in that horrible plasticy paint that is used on some budget guns. The finish is not perfect but is very good at the price and I've owned far dearer rifles thet have a worse finish out of the box.The only issue here is the butt-pad, made from hard black moulded plastic and mine was badly fitted. About an eighth of a inch too low leaving a gap at the top and a overhang at the bottom.Not a major problem though. Oh, and they stuck a sticker on the woodwork !! That bugged me a bit.
The staining is even and seems well applied. The sported shape fits easily in my hands feels comfortable to raise and sight. Quite impressed.

Action / Barrel.

The action and barrel both have nice even blueing and look well finished. No obvious problems here.
The open sights are quite simple but functional, the front blade being made from plastic and the rear made from metal.Elevation is easily adjusted by a small slider. It is posible to adjust windage by loosening one of the screws and 'twidling' the sight but I doubht many will bother. Scope rails are full length of the action.
The barrel strap, toward the forend, is made from plastic for some reason but metal ones are available. It does seem quite secure though and is doing its job fine at the moment.
The only real posible design flaw that I keep thinking of is a 'gap' behind the bolt when the bolt is closed.... I can imagine dirt and crap building up in there over time. ( But I could just be being fussy).
The trigger is machined from a piece of proper metal (not just a folded piece of tin which I've seen before) and the guard is also one piece of solid metal.
Still impressed.

Shooting It.

First I flicked through the user guide cos not had a CO2 rifle before (as you do of corse :rolleyes: ).
I unscrewed the valve cap as directed and inserted the 2 CO2 bulb thingies end to end as per the little diagram. I then replaced the valve cap 'firmly' like it said in the book. After doing this you have to undo the cap by 1 quarter of a turn to release the CO2 into the chamber. I found this quite dificult as I over-tightened it a bit so be aware of this.
That done I set up a backstop at the end of my outhouse and searched for a old phone book to shoot at, :) Yellow Pages, perfect....
After positioning said Yellow Pages against the backstop I picked up the rifle and a tin of .22 Spitfire pellets (which were supplied as a freebie along with 6 CO2 bulbs by Carl when I bought the rifle :cool: ), and set up about 9 meters away from the target. That's the longest run that I have in the house.
The bolt action slides back smoothly and the pellet is easy to load into position. Pushing the bolt forward requires a little more effort but may ease off with use. With a little 'shove' it clicks firmly into position though.
A quick glance at the trigger confirms that safety catch is in the S or Safe position ( I find the catch a little fiddly) so I take aim, flick the catch to F or Fire and squeeze the trigger....
Nothing.. Not even a click :confused: :confused: So I put the safety catch back to the S or Safe position and tried again. This time it fires !!! I'm yet to work that one out but assume that I'll be able to sort it out.
Anyway..
The trigger is smooth with no obvious sticking points or judders and performs predictably and well. (Impressed again). The report is not as loud as I'd been expecting from what I've read but isn't quiet either. Recoil is non existent as expected. I won't really go into accuracy and grouping due to the distance I'm shooting over but half inch groups are a doddle even with the open sights (and my eyesight). Power reminds me of my FN19, not a lot in it IMO.
With the charge of CO2 I reckon I got about 40-50 full power shots before the power started to drop. However I did lose count (:D ) so may be a few more. I did fit a old Tasco 3-9x40 SA on low mounts for a couple of shots toward the end and it's a tight squeeze but pellets can still be rolled into position with relative ease. Medium mounts would be better.

Summary

I like it. Alot. I'd definately recomend this as a budget rifle or for someone wanting to check out a CO2 rifle. It obviously wasn't designed to go against the higher end guns but I can't think of any better rifle in this price bracket.
To look at it and shoot it you would never believe that this gun only cost £60 delivered. Brand New.

Big thanks to Carl here on the forum. Bargain M8 :) , Cheers.

triballofts
28-11-2006, 03:37 PM
good review i too have a xs78 and for the money its got to be the best buy out there i have tuned mine and love it its nice and smooth now worth the time and effort quiet with a decent silencer great fun and no pumping or bottels to worry about works better in warm weather but you carnt have everything great gun have fun with yours as i do with mine graham

Firebird
28-11-2006, 10:45 PM
Thereview I mean! Couldn't have written it better myself.

I have this rifle and the QB78, the DeLuxe version. The QB I think has a slightly better trigger, but other than that they are both cracking rifles for what they cost, a real bargain I would say. They hold up well against my other rifles.

Well done in the review and have lost of fun, I know I have.

Firebird

tailo
29-11-2006, 02:28 PM
Hi,
I am new here. Just ordered an XS78 .22 from QB Tune after reading your well written review.

Tailo.

KIRBY4105
02-12-2006, 03:40 PM
I also bought my QB78 from Carl (great guy to deal with highly recommended)
i bought mine for my 12 year old as a step up from his daisy red ryder
woodworks got some nice graining or staining whatever it looks nice
blueing much better than i would have thought on a gun this price (£60 BNIB) trigger very nice
butt pad perfect fit
all in all more than i expected and Carl forgot to throw some Co2 bulbs in which he offerd to throw in gratis PMed him and he posted 6 to which i realise now i never thanked him for will have to PM him and thank him i did not get any pellets though there was a space for a tin in the polystyrene
Carl did you hold my pellets back (only joking)
i could have bought one local for roughly the same money but was not to
keen on the shop owner so bought of a fellow BBS member instead
all in all very happy with it great value for money
and a big thanks to Carl recieved the gun in about 3 days of paying now thats quick
have thought about tunning it got the info off the yank websites but its to nice to pull apart just yet
glad to hear your happy with yours to and a good review
regards Steve

kevmar
02-12-2006, 06:17 PM
Can these be ''converted'' so you can fill
by divers bottle etc?
kev.

Portland Jon
02-12-2006, 06:44 PM
Kev

Myself and ILJ are working on a PCP conversion at the moment. We'll let you know when the bugs are ironed out.

Jon

Can these be ''converted'' so you can fill
by divers bottle etc?
kev.

kevmar
02-12-2006, 07:19 PM
Thanks jon,
I have looked on the ''archerairguns'' site
and see a screw in cylinder end cap
with a connector,
is this the type of thing?
It was quite expensive compared to a full gun.........

steady
02-12-2006, 07:51 PM
Also fitted it into an altered stock from a 1980's Air Arms sidelever,which i've stained Walnut and given seven coats of danish oil. Experimenting withpressure versus hammer spring etc.to get optimum performance . .So easy to work on and make great Winter
Project.Cheap to buy,accurate and fun to shoot and fettle!!

kevmar
02-12-2006, 09:12 PM
Seals?
Are these for the end cap mate?
kev.

steady
02-12-2006, 10:11 PM
For all seals.Plug/cap(2), valve(1) ,barrel(3) &probe(1). No need to worry about CO2 degrading them.When on CO2 you need at least VITON quality seals in cap/plug &valve to cope with gas.Still cheaper to source from local hydraulics merchant or online wholesaler.

Portland Jon
03-12-2006, 09:34 AM
Hi Steady

I would love to see your PCP conversion and hear more about it. What pressure do you use as the 78 tends to lock up above 1500psi? I'm going to build a new valve for mine over the winter to try to get it to a full 200bar charge.

Jon

steady
05-12-2006, 10:55 PM
Hi Jon,
Don,t put 200BAR on the std gun tube-thats three times its' intended safe working pressure and a potential BOMB!!! The valve is designed as "slow release" to operate at 800-900psi. At 1500psi with such surface area it could well lock.

Portland Jon
06-12-2006, 11:01 AM
Hi Steady

No problems, I am fully aware of the possible problems and won't go above 1200psi. I have just acquired an AA S200 cylinder that I hope to modify for the 78.

Thanks

Jon

rahferret
18-12-2006, 01:48 AM
Ok not the 78, but the guts are about the same, due to the larger size Co2 bottle (88grams) you need to loose off about 300 shots, if you don't use the full contents and leave it till your next outing the valve seal will die, 2 seals in 3 months. finish is crap, you need to strip it down and deburr just about every machined part. Once done this gun with a 3.5/9 x40 scope will compete with some of the best, (forget to mention, sort out front support bracket, unless you want a fully floating barrel)
For info on these guns check out charliedatuna.com

queens_own
18-12-2006, 10:13 AM
Hi All,
Try Archers Airguns in the USA for QB78 parts incl. bulk fill info/bits and bobs, their address is Sales@ArcherAirguns.com.
Thet will post to the UK if you contact them.
Ken

My own QB78 now sports a highly modified stock which is now black, looks a treat.

maddstaff
06-01-2007, 12:58 PM
hi, i've just got xs78, would this be the same for xs78, i cant leave rifle presurised for long periods of time as it would blow seals. this is first co2 rifle i've owned and if so does this go for all co2 rifles.

rahferret
06-01-2007, 01:29 PM
Not sure about other Co2 rifles, but as stated earlier mine has gone through 2 valve seals in 3 months. The first was while shooting a bit too rapid and froze the "silicone" valve seat, the second was not noticable as I had the new seal in and tested it at my local range, about 50 shots, then stored for a week with the Co2 bottle still on, when I got it out to shoot again the bottle was empty, replaced with a new bottle only for it to all leak out from the valve. At least they are easy to take apart.
Bob

derekm
22-01-2007, 02:27 PM
Had the same problem with my XS78, washing out the main valve twice. After that only stored the gun empty and no further problem. Don't forget that you can put an empty CO2 cartidge in first, followed by a full one and just use one at a time, if you are only having a quick session. Saves wasting gas.

Aardys
22-01-2007, 03:29 PM
i have had QB guns for a few years ,and have never blown any seals .
i think you just need to put a couple of drops of SM50 down the cylinder every box of gas used to keep everything free running . as i say i have never had any problems with seals doing this ..
SM50 is silicone and molly as far as i can tell . so is good at the freezing tempretures that co2 is known for ..