Yes, there is. I'll have to shoot at 100 yards (likely) to show it. When it's not rainy out, I'll put it on my list. Do you care which gun it's shown on?
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BC's for FX WildCat Mk II, .25 cal pellets Measured
- Thread starter SMH77
- Start date
Yes, there is. I'll have to shoot at 100 yards (likely) to show it. When it's not rainy out, I'll put it on my list. Do you care which gun it's shown on?
sounds good, very important do not rezero.
go for it show us
cant wait to see
does not matter what gun
go for it show us
cant wait to seedoes not matter what gun
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sounds good, bery important do not rezero.
go for it show us
I won't rezero or adjust any velocity items. I will keep the scope aimed at the same point for both pellets to show the difference in the POI at range. It looks like the crossing point is at about 135 yards, based on using real velocities, BC's etc and then looking at the trajectory plots for both pellets. I can only go out to 130 yards at my home range (too many trees and hills, unfortunately) so I don't think I'll be able to demonstrate the takeover point for you. If I could, I would. However, I suspect this is further out to be practical for shooting / hunting anyway, so it's likely an academic investigation...
Sean
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how did you work that out?
i tried in chairgun and when i kept both gun rezeroed at 50yards and 900fps for 25.4grain and 800fps for the 34grain(not sure if you can push them lot faster) only over 225yards the heavies win
so how often you guys shoot over 200yards for the 34 grainers to rule thays the question
i tried in chairgun and when i kept both gun rezeroed at 50yards and 900fps for 25.4grain and 800fps for the 34grain(not sure if you can push them lot faster) only over 225yards the heavies win
so how often you guys shoot over 200yards for the 34 grainers to rule thays the question
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Using the desktop version of Chairgun Pro (which, btw, is really a nice program). There are multiple tabs for multiple guns. I setup the ballistics for one pellet on one tab, and the other on the other tab. I used the actual, measured BC's from my gun under the same conditions. Set the environmental conditions to be the same. Dialed in the muzzle velocities to be correct for each pellet (again, based on my actual shooting data) and then looked at the velocity / drop chart in the program. I had to extend out to 150 yards to see where the lite pellet was lower than the heavy pellet (both sighted in at 50 yard, BTW). Then I looked through the chart to see they were at the same drop at 135 yards-hence my answer...
Sean
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Don't want to start an argument, but the calcs are based on what you set them to be (I'm not using the mobile version). I've set the zero distance to be the same for both combinations (50 yards), but could easily set them to be different if needed (not needed in this case). The trajectory isn't an 'overlay' per se, but two different (independent calculations done on two different combinations (where I set what I needed to be the same). In other words, it's like running it on two separate computers and comparing the results between screens.
Setup # 1:
Setup # 2:
Header columns (since they got cut off in the scrolling):
Take a look and let me know if I've done something incorrect? the answers are in the column down the left side of the screen shots...
OK, sorry-they ACTUALLY cross at 134 yards...
Sean
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My calculations were based on the same zero distance as an input (50 yards). However, when I shoot the gun, the lites hit high by 0.5 to 1.0 MIL on the target (making the lites 'act' like they've been sighted in further out). I could go back through my comparison testing and adjust the zero point for the lites to show being high by the correct amount at 50 yards and then re-answer your question. It may be that the lites stay higher than the heavies further out...
I think I understand your point above here better now.
Here's a comparison target showing 4 groups of pellets shot at 50 yards with no changes in zero setting. Top is H&N Baracuda, Second is JSB Heavy, Mk I, Third is JSB Heavy, MK II, bottom is JSB Lite. From estimation, the JSB lite group is centered about 1" (~ 0.6 MIL) higher than the JSB Heavy, Mk I at 50 yards.
With this info taken into account, the 'correct' crossing point is out at 184.5 yards between the two. Sorry for the confusion-I meant to do this from the start but messed up the intent initially. Again, these results are based on my 'eyeballing' method-though the direct, on-paper, comparison is shown at 50 yards in the photo above.
Setup # 1:
Setup # 2:
Sean
I think I understand your point above here better now.
Here's a comparison target showing 4 groups of pellets shot at 50 yards with no changes in zero setting. Top is H&N Baracuda, Second is JSB Heavy, Mk I, Third is JSB Heavy, MK II, bottom is JSB Lite. From estimation, the JSB lite group is centered about 1" (~ 0.6 MIL) higher than the JSB Heavy, Mk I at 50 yards.
With this info taken into account, the 'correct' crossing point is out at 184.5 yards between the two. Sorry for the confusion-I meant to do this from the start but messed up the intent initially. Again, these results are based on my 'eyeballing' method-though the direct, on-paper, comparison is shown at 50 yards in the photo above.
Setup # 1:
Setup # 2:
Sean
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So what’s the point using the heavies when the light pellets still hit higher?
Something is telling me slugs will be very similar, there are very few of us shooting 150+ yards
Something is telling me slugs will be very similar, there are very few of us shooting 150+ yards
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Several reasons: the much better BC of the heavies will result in less wind drift; the pellet will carry much better down range energy (for hunting); the heavies (in most cases) group much better at longer ranges than the lites do.
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Right so the bottom line is the range, longe range slugs and heavies, shorter than 75yards ligh pellets are the preferred futter
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Feel free to select whatever pellets you wish to use. I do not agree with how you've broken down the selection as the energy retention difference is very dramatic, much sooner than 75 yards. When testing the BC's, even at 50 yards, many times the heavy pellet is already traveling faster than the light pellet at 50 yards compared to the lighter pellet at the muzzle.
By all means, choose and shoot what you wish. I'm just providing data to help others, while helping myself, use actual data to make the best selection for one's needs.
Sean
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We came to different conclusions. I am just saying without a major retune of the PCP:
Slugs=Slow loopy, heavies medium slow, 25.4grain still gold brick standard
If you don’t get them up to speed/higher energy, the big loss of FPS overweights the improved shape BC gain. At least at normal airgun ranges.
If you get the wildcat easily to shoot those heavy projectiles Over 800 fps... that’s a different story.
at 750fps speeds seem to equal out at yes 130yards. At 700fps muzzlespeed with heavies the range when speeds equal will be 200yards! So up to200yards the 25.4grain is fying higher flatter.
800+ for slugs if you can get there
Slugs=Slow loopy, heavies medium slow, 25.4grain still gold brick standard
If you don’t get them up to speed/higher energy, the big loss of FPS overweights the improved shape BC gain. At least at normal airgun ranges.
If you get the wildcat easily to shoot those heavy projectiles Over 800 fps... that’s a different story.
at 750fps speeds seem to equal out at yes 130yards. At 700fps muzzlespeed with heavies the range when speeds equal will be 200yards! So up to200yards the 25.4grain is fying higher flatter.
800+ for slugs if you can get there
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Ok, I get where you are coming from...
For me, I am mentally shooting my RAW at 60 fpe muzzle energy, so shooting the 34 grain heavies at ~900 fps so it has plenty of power to shoot a heavy pellet with a lot of power. You’re correct on a stock Wildcat-it would be shooting heavies between 750-800 fps, depending on how the gun is set up. My son’s has been setup to ahoot MK II pellets at around 830-840 fps so he is still doing ok with power at around 52 fpe. His gun is not stock though...
For me, I am mentally shooting my RAW at 60 fpe muzzle energy, so shooting the 34 grain heavies at ~900 fps so it has plenty of power to shoot a heavy pellet with a lot of power. You’re correct on a stock Wildcat-it would be shooting heavies between 750-800 fps, depending on how the gun is set up. My son’s has been setup to ahoot MK II pellets at around 830-840 fps so he is still doing ok with power at around 52 fpe. His gun is not stock though...
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I have rerun the test today on both JSB's, both H&N's, and a Ratsniper slug. I have updated pictures, etc so I think I'm going to split it out into a new thread. The BC's are a little different today too-lower temps, and slightly different (very light) wind conditions. I'll post a link after I've posted the new comparison.
https://www.airgunnation.com/topic/fx-wildcat-mk-ii-25-cal-bc-shootout-4-pellets-1-slug-updated/
Sean
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