I'll hopefully make some useful notes as I go. I'm about 5'10", 180lbs, so notes on feel may differ from your experience if you are a different size. I find all three of these rifles fit well to my frame. Tested velocity, accuracy, trigger pull, weight, feel. Because 2 of these rifles are .177 and the other is .22, I have tried to create standard .177 and .22 measures for comparison. Equations used for determining "normal" velocity:
1/2(m*[v^2]) = e
(2*e/m1)^[1/2] = nv1
(2*e/m2)^[1/2] = nv2
(m*[v^2])/FPC = ft. lbs.
V = measured AVE velocity
M = Original pellet weight (lbs)
e = energy constant
M1 = .00113 lbs .177 standard
M2 = .00204 lbs .22 standard
nv1 = Normal velocity for .177
nv2 = Normal velocity for .22
grains per pound = 7000
foot pound constant (FPC) = 450240
7.9 gr = .00113 lbs
10.5 gr = .0015 lbs
14.3 gr = .00204 lbs
18.2 gr = .0026 lbs
All three guns have similar recoil...though the RWS350 is somewhat more notable and the TF89 .177 the lightest recoil of the three. Regretfully I did NOT weigh out the pellets used for testing, so some of the spread and deviation may be attributable to slight weight differences between pellets.
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TF89 .22 New (less than 100 pellets through; owned less than 1 month [10/26]; untuned)
Trigger: 3lbs
Weight: 9 lbs
10 Yard Grouping: .5 C-T-C 5 shot group
Pellet: Beeman Crow 18.2 grain
10 Shot Chrony Testing
Low FPS: 709
High FPS: 720.6
AVE FPS: 715.3
Spread: 11.9
StD: 3.89
Feel: Nicely balanced. I haven't been shooting this gun long, and frankly I think it is the worst grouping I've shot, but I didn't want to taint the results. What may have tainted them slightly is that I am used to shooting my TF89 .177, which is nearly identical in design. I plan to customize this rifle with a custom stock and muzzle brake, and it will be getting a tune, which will smooth it out more and maybe even slow it down a bit. It is starting out pretty awesome.
e = 665
NV1 = 1084.9
NV2 = 807.5
Foot pounds = 20.68
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RWS350 .177 (less than 100 pellets through; owned less than 1 month [10/26]; untuned)
Trigger: 3lbs
Weight: 10.6 lbs
10 Yard Grouping: .7 C-T-C 5 shot group
Pellet: JBS Exact Heavy 10.5 grain
10 Shot Chrony Testing
Low FPS: 904
High FPS: 915
AVE FPS: 908.7
Spread: 10.81
StD: 3.31
Feel: Barrel heavy. Still smokes and diesels slightly. Neither TF89 ever did. Heaviest cocking rifle of these three. While the FPS seems high, noting the NV1 and NV2 and foot pounds, it really is no more powerful than the TF89 .22 -- slightly less perhaps due to the caliber difference. I was frankly expecting quite a bit more from this gun -- both more power, better accuracy, and a more polished feel. For 2.5 times the cost of the TF89 .22, I think I had the right to expect that... and I wonder if it was really money well spent. The TF89 .22 will blow this gun away on all fronts with a tune...and at that point the TF will still be a less expensive purchase.
e = 619.3
NV1 = 1046.95
NV2 = 779.2
Foot pounds = 19.26
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TF89 .177 (owned 1 year; 4000 pellets through; Gene tuned)
Trigger: 1.5 lbs
Weight: 9.2 lbs
10 Yard Grouping: .25 C-T-C 5 shot group
Pellet: JBS Exact Heavy 10.5 grain
10 Shot Chrony Testing
Low FPS: 808
High FPS: 818
AVE FPS: 812.7
Spread: 9.78
StD: 2.82
Feel: Nicely balanced. Lightest & smoothest cocking of the three. Smoothest, best accuracy. Also the rifle I have shot the most by far and so I am familiar with it. The rifle was never chronied before the tune, but I do know accuracy went from .75 to .2 C-T-C. Previously chronied after the tune at 840 fps. I am surprised at the drop off in the foot pounds here, but not at all with the accuracy (which is actually not as good as I have been shooting with this rifle).
e = 495.4
NV1 = 936.4
NV2 = 696.9
Foot pounds = 15.4
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The one surprise I got here is that the .22 was actually pushing more foot pounds than the RWS350! It didn't feel like that was what was happening. I'm glad about my choice to customize the .22. I think it is going to be an awesome project...and I'll be tracking it in my signature...
