The power plant is the main limiting factor for the weight that the rifle can put downrange. They both use the same spring.The smaller diameter projectile is a proven performer (on target) when they start to "run outta gas". The heavier and larger projectile starts dropping off fast. Wind/drop is an effect of time exposed to the elements.If you are an expert USMC shooter, you already know the answer in your mind.Use what you've learned.
All pellets, bullets, and bricks Fall at the same rate. It's the velocity or better retained velocity that creates the trajectory. The lighter 22 will reach a point at range where its more rapidly diminishing velocity will cause it to fall short of the heavier 25. My two Mrods are both at about 880 fops and my 25 is flatter shooting at 100 yards than the 22. It's a matter of ballistic coefficient of the two pellets. You can prove this using Chairgun Pro. In other words, the heavier pellet will retain its velocity longer and farther.
Quote from: Sandspike on March 23, 2015, 11:36:04 AMAll pellets, bullets, and bricks Fall at the same rate. It's the velocity or better retained velocity that creates the trajectory. The lighter 22 will reach a point at range where its more rapidly diminishing velocity will cause it to fall short of the heavier 25. My two Mrods are both at about 880 fops and my 25 is flatter shooting at 100 yards than the 22. It's a matter of ballistic coefficient of the two pellets. You can prove this using Chairgun Pro. In other words, the heavier pellet will retain its velocity longer and farther.True.but...in this case the .25 starts off moving 200fps slower...I personally at those velocities would pick .22 but thereis only about 5-8in difference(if I did my chairgun right..)in the above situation were they both start at equal velocity thenI would go .25.
Quote from: farmerjoe99 on March 23, 2015, 11:58:38 AMQuote from: Sandspike on March 23, 2015, 11:36:04 AMAll pellets, bullets, and bricks Fall at the same rate. It's the velocity or better retained velocity that creates the trajectory. The lighter 22 will reach a point at range where its more rapidly diminishing velocity will cause it to fall short of the heavier 25. My two Mrods are both at about 880 fops and my 25 is flatter shooting at 100 yards than the 22. It's a matter of ballistic coefficient of the two pellets. You can prove this using Chairgun Pro. In other words, the heavier pellet will retain its velocity longer and farther.True.but...in this case the .25 starts off moving 200fps slower...I personally at those velocities would pick .22 but thereis only about 5-8in difference(if I did my chairgun right..)in the above situation were they both start at equal velocity thenI would go .25. Why would anyone want to start 200 fps slower?
All I can say is a .25 will shatter a Corona bottle at 70 yards where the .22 knocks it down.
The .25 has still the most energy left on those distances and pellet drop you will have anyway...
...the heavier pellet will retain its velocity longer and farther.
Quote from: rudeboy on March 23, 2015, 10:39:07 AMThe .25 has still the most energy left on those distances and pellet drop you will have anyway...Quote from: Sandspike on March 23, 2015, 11:36:04 AM...the heavier pellet will retain its velocity longer and farther.Not necessarily. I don't think?At least not based on my experience with my Hatsan Mod 125 Sniper .25s in NPSS & Vortex.I've found that the above assumptions are only true if the .25 is capable of 'pushing' the pellet beyond a certain FPE. Both the NPSS & Vortex .25 shoot the JSB Exact King 25.39 at ~25 FPE which isn't a sufficient FPE to outdo my Walther Talon Magnum (125 clone) .22 spring rifle which outputs the JSB Exact Heavy 18.13 at ~28 FPE.Inputting the necessary data into my Android Strelok app yields a higher residual FPE for the .22 than the .25s at 100 yards. Low 14s vs high 13s respectively. But ... when I swapped out the Vortex .25 for the stock spring, FPE jumped to ~28 & then the residual FPE at 100 yards, according to Strelok, was in the 15s. So in that instance, the .25's residual FPE at 100 yards exceeded the .22.And that's using the stock/standard BC values provided in CGP.I've used CGP to calculate BCs using the BC speed differential calculator for 0 & 25 yards. Using that calculator I've found that BCs can decrease/increase. For example, the BC for the WTM .22 JSB Exact Heavy 18.13 is actually higher than the CGP listed BC. And likewise, the BC for the .25s JSB Exact King 25.39 is actually lower than the CGP #. But I used the CGP BCs for all the calculations in the Strelok app.In summary: the rifle has got to be capable of pushing the heavier pellet at greater FPEs to begin with in order to maintain higher residual FPEs at distance. If that makes any sense?
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