Does a Air Rifle scope need to be re-sighted in when I use Pellets of diff weights

[tgs989]

:confused:Does a Air Rifle scope need Tobe sighted in each time I change pellet weight? Hello,I'm new to the Air Rifle world and I am not sure of somthing. Do I need to re calibrate/(zero) my Air Rifle scope each time I use pellet's of a lighter or heavier weight? Thanks-Tim tgs989

[Parallax]

Yeah you'll more than likely find fairly significant POI shifts with each different pellet and you'll definitely want to re-sight in.

[Mumpig]

That's been my experience also. Sometimes pellets of different weight seem to have the same POI but that's the exception. With my R9 Beeman FTS and Crow Magnums shoot almost identically but then their weight difference is trivial. Otherwise, I re-zero.

[MarvC]

Just curious,
is their a reason you are sampling various ammo for the gun? One of the major objectives in air gun performance is consistency in the gun placing the shot where you aim (POI) hopefully you will find the pellet combination that works to give you the above. If this is your quest try a sample pack from SS in the caliber of your gun.
Re sighting a gun for various pellet loads is the last thing you really want to be doing. If you have a mil-dot scope us it for hold over or under when deviating from the ammo you finds works best with the gun.
You will notice the POI change at the longer distances (Elevation wise) with heavier ammo shooting within the guns limits, compensation is easily achieved with the Mil-Dot.
When changing any scope settings you are introducing many variables in the guns accuracy both at the shorter distances and longer range shooting constant adjustments may well drive the scopes reticle from an optically centered state which then opens a new can of worms to deal with.
Bottom line optically center the scope, find the ammo that works best for your needs and sight the gun in at the distances you will be shooting then leave the scope be.

What type of gun/scope combo do you have..Should have maybe asked this first..

[tgs989]

Hi Marvc, Thanks for the advise. I have a like new RWS 54.22 air rifle w/a CENTERPOINT 3-9-50 with dual illuminated mil-dot reticle. I was shooting it this eve from approx 65 ft away and was having very good groups using JSB MATCH DIABOLO EXACT 14.3. Then I tried crosman premier 14.3 hollow points but the pellets almost fell out of the barrel when I put them in.Very loose fitting but very clean looking! I stopped after about 7 pellets. I also shot RWS Superdome 14.5 & they seamed ok. Then I tried the JSB DIABOLO EXACT 15.9 & they shot approx 2" off from were the JSB 14.5 were hitting.I have a can of JSB MATCH DIABOLO EXACT JUMBO RS 13.43 (domed) that I will try out tomarrow. I also have 3-Tins of H&N SPORT 1-12.65 hollow point, 1-16.36 field target, & 1-15.74 Spitzkugeln(pointed) that I need to test. Marv-I will read your reply several more times to try to figure out what you are talking about concerning using the mil-dot? I dont really understand what you said but I will try to figure it out. Thanks for your advise.I will keep you updated-Tim tgs989

[Ambush Hunter]

I think MarvC was saying that if you have a mildot scope, you can still use more than one brand of pellets, all you have to do is to make a range card based on reference points (mildots) for each pellet. Different ammo produces different ballistics.

That IF your rifle like more than one brand all the same. To me it's a lot of headache though. Just find the most accurate and stick with it. If let's say two brands of pellets are equally accurate, go with the one that gives you most FPE.

[MarvC]

Airgun accuracy is affected by several variables. I would use the (single) pellet that gives you the best accuracy usually domed pellets are the best general use ammo.
Narrowing it down to the above sight the gun in at 20-25 yards (Is there a specific yardage most of your shooting will be done at) once sighted at this range you now have a known baseline to compare other pellets performance to.
Chasing too many variables at one time will just lead to frustration!! Been there done that myself.

A little info on pellet selection.
http://www.straightshooters.com/documents/choosingapellet.html

Also,
What is the primary use of the gun? Hunting, sport, plinking?

[fender5803]

Hi, Danny jumping in here. Can you suggest a decent mildot scope please? I am new to any type of scopes. Mildot's are the shorter ones? Maybe with little magnifications ? I think I am reading that it is "easy" to make a quick adjustment if you have previously sighted in for a specific range or pellet? I bet there is a website that explains the diff. between a "scope" and a "mildot" scope ?
Thanks for any response or advise in advance-!
DT
Walther Talon Magnum .177 (came with Optima 3-9x32 scope)

[tgs989]

Thanks Ambush Hunter-Good Advise. I will stick to the K.I.S.S. method! (Keep it simple stupid!!!) I think I will stick to the JSB pellets which produced the best groups in my RWS 54.22. I am learning somthing new every day about Airrifles/pellets/scopes etc. and really enjoy reading this forum. -Tim tgs989

[Kodiak Enthusiast]

You mean : "does AN air rifle"

Depends. Most of the time you just hold differently for different pells. I cant be bothered dialing in and out everytime i switch pells. Keep in mind some pells shoot a little left and some shoot a little right, its not all elevation.

Pete

[sumatrashooter]

Oh lordy, the grammar police are in force....

Why stop there? I think "diff" should be "different." "Pellets" shouldn't be capitalized. And where's that question mark???

C'mon man, you're slackin'.......

[Scott]

The POI of the same pellet can vary with weight variations at least in this test shooting weighed pellets out of myTX. They're all accurate enough.......just different POI's.

http://i26.photobucket.com/albums/c117/ScottMn/Pellets/JSBWeights-1.jpg



Scott

[fender5803]

Can you suggest a decent mildot scope please? I am new to any type of scopes. Mildot's are the shorter ones?

In regards to my above questions I now see the answers to some of it. I was thinking about the shorter "scopes" found commonly on pistols. Thanks to all for my "newbieness" in the world of sighting. I would still love to be pointed to a website that answers every possible question about scopes, especially for heavy recoil and spring rifles.
Thanks,
DT

Walther Talon Magnum .177 (came with Optima 3-9x32 scope that is quite unstable)
:

[tgs989]

Thanks Kodiak for the info on "Keep in mind some pells shoot a little left and some shoot a little right, its not all elevation"-I will keep that in mind-Tim tgs989

[MarkRW]

I purchased the Beeman RAM Air Rifle Combo, RS2 Trigger by Beeman, .22 caliber, about a month ago and have been shooting at paper targets from 25 ft. I have tried the following pellets:

RWS Superdome .22 Cal, 14.5 Grains, Domed
RWS Meisterkugeln Standard .22 Cal, 14.0 Grains, Wadcutter
H&N Baracuda Match .22 Cal, 21.14 Grains, Round Nose
Crosman Premier .22 Cal, 14.3 Grains, Domed

I sighted in with the RWS Superdome, and achieved 5 shots in the black on a Crossman "Official" 25 ft target (about 0.75" diameter for scoring ring 8). Switching first to the Meisterkugeln and then to the Premier, I did not have to resight by more than 0.5" L/R or U/D. The Barracuda, however, shot about 1" to the right and 6" high at this distance. Is this due to the mostly to the design and weight of the skirt?

[GBertolet]

Pellets of significantly different weights will shoot to different points of impact. Usually heavier pellets will shoot higher. The reason is, that they are slower and take longer to exit the barrel. There is recoil generated by the spring, which raises the muzzle slightly in firing. The muzzle has more time to rise before the heavier and slower pellet can exit. The Barracuda pellet is significantly heavier than the rest of the pellets that you have tried. A slight dispersion can occur with different pellets, even of the same weight, due to different aerodynamics. Find a pellet that shoots good for you in your airgun, and stick with it. MarkRW, if you backup on this thread, there are previous posts on this subject that might be helpful.

[Ambush Hunter]

I believe it's because heavier pellets retain energy and velocity better than light ones. That's why heavy pills impact "higher".

[PortlandGuy]

It's all really very simple. Just use the quick formula below...

http://oregonian.biz/pics/easy-way-to-calculate.gif

[KevinG]

Portland Guy,
Excellent, but I think you're missing part of the equation on line 7. Look close and I'm sure you'll figure it out!!!
Kevin
Straight Shooters

[PortlandGuy]

You are correct sir! That part of the formula always gets me.

[MarvC]

The comments in this thread amaze me!

:cool::cool::cool::cool:

[HappyCamper]

It's all really very simple. Just use the quick formula below...

http://oregonian.biz/pics/easy-way-to-calculate.gif

Since when has airgunning migrated into the domain of rocket science?:D I guess we need KISS police here...this forum rocks!

[PortlandGuy]

Since when has airgunning migrated into the domain of rocket science?:D I guess we need KISS police here...this forum rocks!

That IS the simple formula. The longer, though slightly more accurate, is much more difficult.

[The Verminator]

Sure would be nice if someone wrote a "Spring Gun Bible" for the new millennium...

So much effort goes into rehashing the basics on a forum, it would be nice to just say "look on page 123 of your "Springer-Bible", there is a clear explanation and helpful charts/graphs and/or pics to aid in your airgunnin' edification...

Yep, somebody ought to do it...TV

[MarvC]

Or use the search option the forum offers!