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 Post subject: Air Arms help!!!
PostPosted: Thu Apr 19, 2012 7:25 pm 
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Joined: Sat Nov 12, 2011 7:46 pm
Posts: 244
Location: Ottawa
Well i finally did it. i went to Airgun Source with the idea of picking up a Hammerli AR20FT but left with an Air Arm S400 MPR FT instead! They had just arrived and it fit like a glove so i couldn't resist. Being a newbie I have a few questions that I'm hoping the more experienced among you can answer.
In the manual it states that the recommended fill pressure is 100/110 BAR. The photo in the manual then shows the pressure dial with the caption "this shows the pointer indicating just over 150 BAR". I know the max fill pressure is noted on the cylinder is 190 BAR so my question is: what pressure do you guys normally fill to? Also, in your preferred pressure range how many shots do you normally get before you re-fill?
any recommendations appreciated.

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 Post subject: Re: Air Arms help!!!
PostPosted: Thu Apr 19, 2012 7:47 pm 
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Joined: Fri Aug 24, 2007 9:21 pm
Posts: 2102
Location: Greater Napanee, ON, Canada
BJP wrote:
Well i finally did it. i went to Airgun Source with the idea of picking up a Hammerli AR20FT but left with an Air Arm S400 MPR FT instead! They had just arrived and it fit like a glove so i couldn't resist. Being a newbie I have a few questions that I'm hoping the more experienced among you can answer.
In the manual it states that the recommended fill pressure is 100/110 BAR. The photo in the manual then shows the pressure dial with the caption "this shows the pointer indicating just over 150 BAR". I know the max fill pressure is noted on the cylinder is 190 BAR so my question is: what pressure do you guys normally fill to? Also, in your preferred pressure range how many shots do you normally get before you re-fill?
any recommendations appreciated.

I usually fill to the max pressure and shoot a whole string over the chrony, recording every shot and the pressure after every 10 shots. This always answers all my question of where to fill for the top pressure, where to refill and how many shots I get. Not too many guns give the same numbers, even if the gun is the very same model.

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 Post subject: Re: Air Arms help!!!
PostPosted: Thu Apr 19, 2012 7:58 pm 
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Joined: Sat Nov 12, 2011 7:46 pm
Posts: 244
Location: Ottawa
I appreciate the input. No worries with filling past the Air Arms reccommended 100/110 BAR then? It seemed odd they said one thing but showed another. I will fill and chrono to see where the velocity starts to drop off. Steep learning curve but I'm looking forward to it!

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Air Arms TX200 MK III
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 Post subject: Re: Air Arms help!!!
PostPosted: Thu Apr 19, 2012 8:33 pm 
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Joined: Sun Oct 16, 2005 11:56 pm
Posts: 420
Location: Ontario
Great choice! You will not regret buying that gun.

Quite a few of the FT guys own AA S400 series guns, or two, or three...

The 100-110 bar top fill makes no sense. You may want to read that again. Even if in print, you should fill to 190-200 bar, and do as MAC said and shoot down and record your findings.

Remember you are looking to find the pressure that will allow your shots to be within a 10fps +/- variation. Likely your sweet spot will start around 180 BAR, and you will likely need to refill by 100 BAR. You will know when to refill by the velocity continually dropping. But understand that when you top fill to 190 BAR your velocity may rise gradually, then stay steady then drop again when it is time to refill. Too much air in the tube will result in lower velocity. So don't be surprised to see your velocity actually rise some from say 190 BAR to 175 BAR, then hold steady for 60-75 shots, then gradually begin to fall. When the fall starts, time to refill. Make a note of the fill BAR that gets you into the top of the sweet spot, and the refill BAR, and how many approximate shots.

Really quite easy and enjoyable stuff. Your MPR FT should shoot 8 grain pellets in the 770-800 fps range. Generally it will like JSB Exact or Express pellets the best.

Have fun, and let us know how you make out. Pictures of your new weapon would be cool as well!

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 Post subject: Re: Air Arms help!!!
PostPosted: Thu Apr 19, 2012 8:50 pm 
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Joined: Sun Dec 19, 2010 7:21 pm
Posts: 1314
Location: Didsbury,Alberta,Canada
you have picked a awesome rifle
I just have the 410's - 400 is very sweet looking unit
The other 2 fellows that replied are a wealth of info
One of the great things on this forum
Lots of knowledge and the members share the info
The triggers on the AA's sure are sweet

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 Post subject: Re: Air Arms help!!!
PostPosted: Fri Apr 20, 2012 12:57 pm 
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Joined: Fri Oct 07, 2011 5:18 pm
Posts: 559
Location: near Ottawa
I tried BJP's rifle and OMG, that's accurate!! Time for me to start practising...

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 Post subject: Re: Air Arms help!!!
PostPosted: Fri Apr 20, 2012 1:14 pm 
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Joined: Mon Nov 14, 2005 2:45 pm
Posts: 501
Location: Toronto, ON
Just to note, my MPR 400 has a shot count of 75 before it starts to drop in power. This is from a 180 bar fill and 780fps.

The AR20 is an interesting rifle, and has the potential to be 'better' but they're still unproven and have a few negatives about them (stiff cocking and front heavy) so it's a bit of a risk. The MPR on the other hand is a proven platform, and will retain its value and can easily be sold for many years to come. Good pic!

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 Post subject: Re: Air Arms help!!!
PostPosted: Fri Apr 20, 2012 3:39 pm 
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Joined: Sat Nov 12, 2011 7:46 pm
Posts: 244
Location: Ottawa
Well I set it up today with a Hawke optics 6.5 X 20 scope and just zero'd it. I couldn't believe the results!!! I was using a bench with a front rest and rear bag to gauge the potential accuracy of the outfit. i was only at about 20 yards but the JSB's just kept going through the same hole. The H&N FT's also worked well.
No chrono testing yet as I was just setting the gun up to fit me but I couldn't be happier. As dHb noted he visited and fired a few shots and the only thing he said after his 5 shots went through the same hole was "scope's about 1/10th of an inch low for me".
Compared to the AR20 that dHb has the selling point of the MPR was indeed the better weight balance (IMHO) and lighter weight. He will still outshoot me but I'm convinced that any misses will not be because of my equipment. they will all be shooter induced.
I should also mention that Travis at Airgun Source was excellent to deal with. He let me compare the AR20, MPR and the EV2 (if only there was no mortgage!!!) and a variety of scopes. He gave me advice but let me decide what would work best for me. All around a good experience.
Now I want a springer also...............just because.

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Some people are like a Slinky, they serve no real purpose, but bring a smile to your face if you push them down a flight of stairs!

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Air Arms TX200 MK III
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 Post subject: Re: Air Arms help!!!
PostPosted: Sat Apr 21, 2012 7:23 am 
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Joined: Sun Feb 05, 2012 6:44 pm
Posts: 30
Location: Richmond, On Ottawa
You should post some pics.


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 Post subject: Re: Air Arms help!!!
PostPosted: Sun Apr 22, 2012 7:12 pm 
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Joined: Sun Dec 19, 2010 7:21 pm
Posts: 1314
Location: Didsbury,Alberta,Canada
Yes please
Post some pics of that fine unit you have

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 Post subject: Re: Air Arms help!!!
PostPosted: Fri May 04, 2012 6:50 pm 
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Joined: Sat Jan 24, 2009 2:47 am
Posts: 2242
My AA 400 FT is in the mail, so I share your enthusiasm! I can hardly wait for arrival! Thanks for all of the posts here, guys! Saves me asking the same questions! :D


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