What's the difference in point of impact (with same wind) among. 25 with 34 grain and. 177 with 8.44?

[Emu]

With the 25 and JSB 34 grain at 100 yards you will hit a target the size of a marbe but with the. 177 and JSB 8.44 grain you will be out of the target up to 3- 5 inches.

That big is the difference in accuracy at 100 yards among calibres because wind effect. Without wind both rifles can be equally accurate at 100 yards.

 

[SkeeterHawk]

There is a lot of science here that I am sure that others on this forum are more qualified to answer, but I will take a stab at it to keep the thread going and (hopefully) get some more intelligent feedback.

This all comes down to ballistics. This is all relative to the shape of the projectile as well as the twist rate on the barrels, rifeling, etc. It also has to do with whether your wind is a cross-wind, diagonal, or a head/tail wind as all can affect the travel of the projectile differently depending on the ballistic properties of that projectile. I hesitate to say that it is just the Ballistic Coefficient (BC) as that is only relative to the drag, not necessarily the accuracy as you were asking.

Anecdotal evidence, pretty much all of the guns that placed at RMAC were 30cal. The 30cal buck the wind better than smaller calibers because there is more mass in the pellet for the wind to push around. The 0.177 you have will suffer in the wind worse than the 0.25cal, unless there is something else jacked up with your 25cal, like the twist rate, etc.

I hope that this helps a little.

 

[JungleShooter]

I'm not quite understanding the issue here, I guess.

Emu, are you telling us something, or are you asking us something? Maybe it's too late and my brain is fried....

Matthias

 

[Mrshosted]

I'm not quite understanding the issue here, I guess.

Emu, are you telling us something, or are you asking us something? Maybe it's too late and my brain is fried....

Matthias

I think that there is some translation mix up, causing some question.

 

[shambozzie]

@Emu, I don't have a .25 but this is what a 5 mph crosswind will do to a .30 cal 44 pellet as compared to jsb 10.3. Crown .30 @ 875 fps and Fx royal @ 900. Hope this answer your ?.

 

[Emu]

I just shared what time after time I saw in my shooting with the Vulcan 3 .177 and the Daystate Renegade .25.

 

[shambozzie]

My findings is that the wind will effect any pellet at 100 yds. Lighter pellets more. My example was with a 5 mph crosswind wind. Your milage differ. No problem.

 

[LDP]

With the 25 and JSB 34 grain at 100 yards you will hit a target the size of a marbe but with the. 177 and JSB 8.44 grain you will be out of the target up to 3- 5 inches.

That big is the difference in accuracy at 100 yards among calibres because wind effect. Without wind both rifles can be equally accurate at 100 yards.

You dont list how much wind but I think you have your ballistics messed up or you use a very large marble My .25 shooting 34 gr JSB mk2 at 875 fps has the pellet pushed .8" at 100 yds with a 1mph 90 degree cross wind. If that wind fluctuates even 1 mph making it a 2 mph wind then the drift will be 1.5 " at 100 yds. So either you use a very large marble or you are not shooting in any wind if you are claiming the .25 and 34 gr pellets are not effected by even the slightest wind at 100 yds.

 

[John "spysir" Blount]

I would say for airgun fun .25's (though an RWS52 in .25 is fun) take the fun away. I also consider 100 yards not really an airgun range. I understand people using airguns for fun at distance too. Fired many a slug in 2000 from a Career 707II .25, helium .... . Had a Robb Hand (?) original Big-Bore .44 that hit red bricks at 200, fun, briefly and just to show other folks. LA Outlaw I fired 50 times, took to an FT shoot for folks to shoot, sold the local pharmacist on airguns & sold the rifle to a friend for a bit less than I paid.

.177 ! Fun! Educational. Challenging, budget priced (okay tiny) ammo. Bench is challenging, Field Target is darned differential calculus+.

Target years ago just bored 110 yards w/custom QB at 12fpe(under naturally) swirling winds measured at 9mph-15 yards only- .clicking for range but still 3 dot's holdover & furthist right mil-dot centered on bull, 3 shot groups (ya, count the holes) Wind is FUN and .177 is the teacher.

The silly .25 Escape we have did shoot so easily at 70+ the neighbor loved it and I could have walked him into the same 2" target with the AA410 .177 but would have been much harder & likely less fun for him.

Heck I guess they are all fun.

John

note several pellets did not even penetrate the backer making me thinking 10 was pretty well all it had.