Winchester 22 WMR 45 Grain Ammo
The last gunshow I went to, I saw some Winchester 45 grain 22 rimfire mag ammo. I have lots of the 40 grain, but have no experience with 45 grain. I couldn't find any ballistics data on this. Does anyone have any experience with this ammo?
Will be using it in 2" barrel revolver. I have had a tendency to believe that the heavier bullet weights performs better in short barrels pistols, in terms of maximizing energy delivered, as the bullet will be in barrel longer and have more opportunity to build pressure. That is, after being fired, the heavier weight will allow the bullet to build more pressure ultimately deliver more ft/lbs of energy.
If this would be superior ammo for a short barrels revolver, maybe I should chuck (shoot up) all my 40 grain ammo and go with the 45 grain ammo.
MEMBER SINCE 10/24/1999.
To err is human, to moo is bovine.
Will be using it in 2" barrel revolver. I have had a tendency to believe that the heavier bullet weights performs better in short barrels pistols, in terms of maximizing energy delivered, as the bullet will be in barrel longer and have more opportunity to build pressure. That is, after being fired, the heavier weight will allow the bullet to build more pressure ultimately deliver more ft/lbs of energy.
If this would be superior ammo for a short barrels revolver, maybe I should chuck (shoot up) all my 40 grain ammo and go with the 45 grain ammo.
MEMBER SINCE 10/24/1999.
To err is human, to moo is bovine.
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One would think the heavier bullet would hit harder. However, speed has to do with how well the HP opens up. Even though a bullet may be carrying more potential energy, if it doesn't open up upon contact, it carries that energy right on through and behaves like a hardcase. So, in that case, if the smaller bullet was moving faster and opened up, and the larger bullet was moving slower and didn't open up, the smaller bullet would deposit more energy upon contact. If neither bullet, coming out af a 2 inch barrel is moving fast enough to open up, then the larger bullet would deposit a proportunately larger amount of energy. If they are both opening up, of course, the larger hits harder.
This is my opinion from what I know about ballistics; of course, I am not an expert.[^]
(I realize you didn't state the rounds were HPs, but one can extrapolate the logic and apply it to "soft nose", "solid lead", "copper jacketed", etc.)
Frog.
RiBBButt...You can't rollerskate in a buffalo herd, but you can be happy if you've a mind to. -Roger Miller0 -
Hi,
Here is some ballistic data for velocity and energy for the 22 Winchester Magnum with 45 grain bullet compared to a 40 grain 22 CCI Magnum.
Evidently, Winchester hasn't yet developed the ballistics data for a pistol yet.
Since velocity and energy will be relative whether fired from a rifle or pistol, you can see from the graphs that the 40 grain CCI load will always develop more energy than the 45 grain load. This is because the 40 grain CCI load develops 375 fps higher velocity. The bullet weight isn't that important in this example.
In the energy equation, KE(ft/lb)=[V^2(fps)/450400]*M(grains), you will notice the importance of velocity - it is squared (V*V)then multiplied by the bullet weight. Therefore, even though the bullet is heavier, it won't generate more energy than the 40 grain load.
Save your 40 grain loads.
Regards,
Heavyiron
"If I don't see you nomore on this world, I'll meet you on the next one, and don't be late!" - Jimi Hendrix0 -
BB, If you like the heavier slugs for a .22 mag, you may want to try the Federal 50 gr. hollow point. It is what I use in my rifle and they hit hard!! I get real good accuracy from them and the hollow point is deeper and wider than most I have tried. Excellent expansion on groundhogs.
"They call me Don. Dr. Jason Donald Dalinger."0 -
Here's a chart at my disposal:
The 40gr JHP and JSP by PMC hit harder than the 45gr offered by CCI Speer and Winchester,
but it must be because of the charge; the 50gr JHP offered by Federal, as suggested by Dondalinger delivers only 5 lbs. less at l00 yards. The increased diameter at the impact point adds to the devastation. Both the 45gr examples fall way back, so it may be that they are manufactured with the same charge as the 40gr. Just a guess.
The manufacturer makes the difference with the RWS 40 grain HP coming out on top for close work with 177 ft lbs at the muzzle.[^]
Frog.
RiBBButt...You can't rollerskate in a buffalo herd, but you can be happy if you've a mind to. -Roger Miller0 -
The problem with those charts is that they are from a rifle.
This may be more useful.
http://www.naaminis.com/bwmvel.html
I am also not convinced that energy is the only important factor.
If you consider momentum instead you will see that the heavier
bullet will fare far better.
The three reasons to want the bullet to open up are 1. prevent overpenetration 2. hydostatic shock 3. so called knock-down power from rapid energy dump.
All of these may well occur with larger rounds but I suspect
that deeper penetration will be more useful with the smaller
lighter rounds.0 -
Thanks to everyone for responding.
gruntled, I had seen the NAA site before but never checked into the Black Widow stats, always looked at other stats (for the other models). The Black Widow most probably represents the 2" barrel Taurus I am looking to maximize.
I also spotted the new NAA 25 caliber ammo, essentially a necked down 32 ACP. It was interesting that the 25 NAA 35 grain ammo develops 1200 FPS, while the 34 grain Winchester Supreme is virtually identical from the 2" barrel Black Widow. Maybe 5 or 10 FPS less. Also, the write-up on the 25 NAA bottleneck re-inforces my suspicion that an 8 shot 2" Taurus is an adequate round for a lady's night stand pistol (I already did some math, and 8 round of .22 WMR ammo from a 2" barreled revolver yields more total energy than 5 rounds of 38 Special from a 2" barreled revolver). Considering the savings in ammo, the cost of the firearm, and relative simplicity of a DA revolver for a lady, I think the Taurus fairs very well when compared to the NAA Guardian.
Frog, on your chart, the (RWS) manufacturer also looks like some very potent stuff. But here is a stupid question, who the heck is RWS, and where do you buy the ammo?
Also, the NAA charts just give velocity and bullet weight, nothing really to convert to energy. Anyone have a formula?
Please keep this very helpful info coming.
MEMBER SINCE 10/24/1999.
To err is human, to moo is bovine.0 -
Boeboe,
The chart that I linked you to is titled "Rimfire Handgun Ballistics" and is included in the Guns and Ammo 2005 Annual Buying Guide, pages 174-175.[^][^]
Here's a link on RWS: http://www.dnrws.com/products.html
Frog.
RiBBButt...You can't rollerskate in a buffalo herd, but you can be happy if you've a mind to. -Roger Miller0 -
That's kinda the same thinking I did when I chose a 2" Taurus 8 shot 17HMR for CCW. High velocity, inherent accuracy, devastating impact, and seven friends in case of a miss.
"Qui non est hodie cras minus aptus erit" --OVID0 -
Hi BB,
In your last post you ask the question: "Also, the NAA charts just give velocity and bullet weight, nothing really to convert to energy. Anyone have a formula?"
The formula was in my first post. Here is the formula to calculate kinetic energy:
KE(ft/lb)=[V^2(fps)/450400]*M(grains)
KE=kinetic energy in ft/lb
V=velocity in fps
M=mass of bullet in grains
Regards,
Heavyiron
"If I don't see you nomore on this world, I'll meet you on the next one, and don't be late!" - Jimi Hendrix0 -
Oh, now I understand the ^ and *, means squared and times. I can do some calculations now.
Actually, ^ would mean "raised to power"....
MEMBER SINCE 10/24/1999.
To err is human, to moo is bovine.0
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