Excitement, Stress and then Relief. This was what I experienced today
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Excitement, Stress and then Relief. This was what I experienced today
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Topic: Excitement, Stress and then Relief. This was what I experienced today (Read 1772 times))
.20cal fan
Plinker
Posts: 136
yes
Real Name: William
Excitement, Stress and then Relief. This was what I experienced today
«
on:
March 25, 2015, 12:37:35 AM »
Members, today was my 1st ever experience with a chronograph that I had direct influence on. Meaning, in the Marine Corps I used them a lot but never set it up directly myself. The PMI or armorer was responsible. So let me start off with this:
You may and may not have seen my posts about trying to find out, to guessestimate my fps for my HW95 (.22), my RX2 (.20) and my C9A Blue Streak. I did not have a chrony so I have been trying to find it by zeroing at whatever distance, then shooting at another distance, measuring the drop, remembering the drop, open chairgun on my android and messing with the fps till i matched the drop in inches to what I had already recorded on the target.
After reading my post, if you walk away with anything or nothing, please walk away w/this advice: NOTHING and I mean NOTHING beats actual behind the trigger time. Knowing ones rifle is like knowing if your kids are lying...you just know it. Anyway so again, my 1st time by myself w/a chrony and to me, I consider myself intelligent, but reading the directions for the Alpha made me feel like I was in physics class because I read all of it. Even stuff that probably didn't even pertain to my situation. So I finally got it together and started shooting my 95 first. Now just for some background. The person who sold it to me was the second owner and was sure that neither he nor the 1st owner, opened her up. Ok, enough said. The 2nd owner was such a great person to buy from, he even included a sampler pack of different pellets with each pellet chronied. Here they are:
2nd owners chrony #'s straight shooters "our take"
rws superdome: 740fps 670fps
jsb 18gr: 629fps 606fps
jsb 13gr: 726fps 637fps
cp(brown box): 726fps 647fps
Predator: 617fps 595fps
So I believed the 2nd owner when he said that she probably only got about 100rds through her. Well I probably had her for 2 months now. Probably close to 900-1000rds through her and this is what I got today.
My chrony #'s: Straight Shooters "our take" #'s:
HW95 in .22cal shot:
CP's of an average of 712fps, ES: 22fps, SD: 7.93 CP's: 647
Beeman FTS of an average of 693fps, ES: 11, SD: 3 Beeman FTS: 674
H&N FTT's 5.54's @ an average of 713fps, ES: 31, SD: 18 H&N FTT's 5.54's: 680 (didn't have other grains)
H&N 5.53's @ 711fps, ES: 12, SD: 4
So except for the CP's, everthing else ran faster. Good? Bad? Who knows, but the CP's and the 5.54's are nice.
All strings were pretty nice for a 1st timer using a chrony and for the amount of rounds already through it.
Now for my Sheridan Blue Streak, the C9A .20cal:
Shooting JSB's for an avg of 615fps with ES: 24.88 and SD: 6
Now here was my worry. I have a RX2 in .20cal. I'm the 3rd owner and she is 9yrs old, i think. I don't know if it has ever been opened up, but I do know that the 2nd owner nor I have attempted to open/tune her.
Straight Shooters "our take" listed her shooting JSB's at 760fps. First string she averaged 677, ES: 45 and SD: 14.7. hey!??? My second string came at an average of 669fps, ES: 35 and SD: 10.86. All averages were from each gun was a 10 shot strings. The HW was pretty close to SS except for the CP's. The C9A i don't really worry about. But the most expensive animal of the small herd is doing/did the worse. Now don't get it messed up, she is still awfully accurate for a hunting rig and that is the part that I don't understand? Should I be happy? Of course I should, but I am an airgunner who loves to mess up a good thing. Not on purpose but I do none the less. I guess the only way to tell is to open her up. I have to send it to someone because I do not have a way to recharge her. Anyone have an opinion as to who I should send her to or a clue as to what I should do?
***Now what I had just wrote was was actually done this morning around 9am. I just kept a small journal, copied and pasted it. What you are about to read is just about the RX because it is what I am/was so concerned about.
so this is what happened this evening around 5pm. Since having a concern about my RX2 .20cal. here i thought it was my rifle just was either leaking from the valve, a bad seal (piston and/or breech) or a dying ram. Then i thought that "how can it be any of those if it's still accurate". So I thought it was the chrony and or the lighting or lack there of since it was my 1st time. So I reached out to a known but unknown AG guru and he made a simple but understandably common statement. He said "someone probably let some of the air out of it so it could shoot smoother or for whatever they intended it for". Simple enough. Back outside, set the chrony up, a 10 shot string later and a same but better answer. A high of 679fps, a low of 659fps, an average of 669fps (that was her average of the last string earlier this morning too so that is the same part of the answer and then here is the better part), ES of 19.88 and a SD of 6.08 w/JSB's i think 13+grain. Consistant? Yes! So my friends, all the fretting, stressing, worrying etc was for nothing. She just has a lower charge than what she came with from the factory but pretty consistent for a 9yr old and "dang" accurate.
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Coatesville, PA
.20cal Fan
Sfttailrdr46
Beginning the next chapter
GTA Senior Contributor
Posts: 16152
Me at Devils Tower Wyoming 8-13-2000
Real Name: Don
Re: Excitement, Stress and then Relief. This was what I experienced today
«
Reply #1 on:
March 25, 2015, 12:48:38 AM »
That is a good bit slower than a fully charges piston my RX2 .20 was shooting about 980 fps when I first got the rifle from the original owner with less than 200 pellets through it. I now have ~1,500 through is and after letting out a little air it's shooting at ~900 fps for ~20 fpe. It cocks much easier and is actually shooting quieter as well
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Mesa Arizona
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Txfish219
Shooter
Posts: 41
yes
Re: Excitement, Stress and then Relief. This was what I experienced today
«
Reply #2 on:
March 25, 2015, 03:21:45 PM »
FWIW - I purchased/own that RX2 .25 from Paul Capello(Airgun Reporter), thinking it would be shooting at the 24ft.lb. zone. Somewhere between his video and my acquisition, the air pressure was reduced and it's now shooting a comfortable 18.55ft.lbs. with H&N FTT 19.91grain - giving me a SD of 2.0.
Yes - I could bump it up, but I enjoy the smooth cocking stroke and accuracy at the current setting.
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Roanoke, VA
anuthabubba
Plinker, Pester,
GTA Senior Contributor
Posts: 2068
Real Name: Terry in LP
Re: Excitement, Stress and then Relief. This was what I experienced today
«
Reply #3 on:
March 25, 2015, 03:46:14 PM »
A few years ago I detuned my 'mule' R1 .22k to ~18fpe from~21fpe and am happier with it now.
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northeast Louisiana
"There ain't no guru, can see through your eyes."
http://www.gatewaytoairguns.org/GTA/index.php?topic=92772.msg873100#msg873100
https://www.youtube.com/watch?v=bFyUo_xX4g0
@ 3:45 to 4:15!
Clean it, lube it, pump it, shoot it.
Sfttailrdr46
Beginning the next chapter
GTA Senior Contributor
Posts: 16152
Me at Devils Tower Wyoming 8-13-2000
Real Name: Don
Re: Excitement, Stress and then Relief. This was what I experienced today
«
Reply #4 on:
March 25, 2015, 07:21:42 PM »
I see a consensus developing here drop the stock fill pressure and get the rifle shooting at ~900 fps for a comfortable shot cycle and and excellent accuracy
Logged
Mesa Arizona
AA S510 Xtra Fac .177 RH Walnut For Sale
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Marauder GenII .30 Boyd's TH 100+ fpe For Sale
RWS D34 .22
RWS D460 .177
PP700 SA ,22 PCP pistol W/Rocker1 LDC & Red Dot For Sale
CP2 .22 Pistol/Carbine
SPA Varmint .177
Freedom 8 & Guppy CF Tank & 45 min SCBA
.20cal fan
Plinker
Posts: 136
yes
Real Name: William
Re: Excitement, Stress and then Relief. This was what I experienced today
«
Reply #5 on:
March 27, 2015, 02:20:13 PM »
Will do. 18Ft/lbs here i come
Logged
Coatesville, PA
.20cal Fan
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Excitement, Stress and then Relief. This was what I experienced today