View Full Version : Chrono Data - Federal XM223SP1 62gr Bonded
Temp = 58F
Elevation = 1300'
prochrono @ 15'
Federal XM223SP1
62gr bonded .223
20" Colt 5.56mm 1x7", freefloated with 3x9 Nikon Scope
Lot # 49P659X005
2777
2743
2760
2751
2778
-------
2762 fps ave (relatively mild for a 20" barrel)
Other observations: Accuracy was reasonably good at about 2MOA (1") at 50yards, much better than 62gr Remington Core Lokt Ultra Bonded, but not as good as 75gr Hornady 5.56mm TAP in this rifle. I also shot it into water at close range and it did not hold together as well as the 62gr Remington that was going probably 75fps faster. Bottom line is it's a relatively cheap ($9.90/20 rounds), reasonably accurate load that maintains decent, but not spectacular, bullet integrity.
Seems weak. Did you by chance measure COAL? Would be grateful to get a charge weight on a pulled round.
Seems weak. Did you by chance measure COAL? Would be grateful to get a charge weight on a pulled round.
Not the most powerful .223 for sure, but I honestly think that this bullet would do better, by that I mean hold together better, when fired out of a shorter barrel with less velocity.
COAL = 2.231" (via lyman dial caliper)
Charge Wt. = 24.2gr (Wonder how this compares to the 64gr Gold Dot?)
Bullet Wt. = 61.8gr (somewhat mangled getting it out of the case since I don't have a bullet puller)
Weights measured with an old RCBS beem scale.
Thanks DRT. I have 62gr and 64gr pulls of this flavor and am trying to figure out some loadings for them. 24.2 grs. would explain the slow velocity. That would only be about 2500fps out of 16" or shorter barrels.:eek:
These rounds were designed to expand and perform at much lower velocities though I'm sure...
And thanks for the info!
Thanks DRT. I have 62gr and 64gr pulls of this flavor and am trying to figure out some loadings for them. 24.2 grs. would explain the slow velocity. That would only be about 2500fps out of 16" or shorter barrels.:eek:
My experience is that my 16" LE6920 generally runs about 4% slower than my 20" rifle. I'm guessing that'll put them in the 2650fps range. I'll chronograph them out of my carbine next time I have a chance just to confirm.
I dont reload .223 but you got my interest up so I did a search and found this.
http://beta.ar15.com/archive/topic.html?b=3&f=16&t=510446
Very similar COAL and 24.1gr so I guess it's typical. What charge weights have you measured in your fusion and gold dot?
These rounds were designed to expand and perform at much lower velocities though I'm sure...
And thanks for the info!
I think you are spot on. They definitely expand. Water at close range is tough on a bullet but I bet they'd do much better in a 10.5"-14.5" weapon. They probably won't come apart so much at the lower speeds.
My experience is that my 16" LE6920 generally runs about 4% slower than my 20" rifle. I'm guessing that'll put them in the 2650fps range. I'll chronograph them out of my carbine next time I have a chance just to confirm.
I dont reload .223 but you got my interest up so I did a search and found this.
http://beta.ar15.com/archive/topic.html?b=3&f=16&t=510446
Very similar COAL and 24.1gr so I guess it's typical. What charge weights have you measured in your fusion and gold dot?
I am reloading these, so don't have factory ammo to compare with.I was doing accuracy testing on loads from 24.4 up to 25.6 on the 64grainers, 25.6 having the best results.Around 25 is what the 62 grain Fusions liked. Not trying to start this into a reloading thread.
I appreciate the testing and the info.:thank_you2:
I'm sure many of you are familiar with the Speer Gold Dot 24448 and how it performs, well Doc's post in this thread made my decision to pick up the XM223SP1 since its so much cheaper...
https://www.m4carbine.net/showthread.php?t=73955
Thanks for the chronograph data. Pretty much confirms what I was expecting after shooting some at 100 to 500 meters through a 14.5" DD LW. At 300 & 400 it was pretty clear it was on the slower side. The bottom really fell out at 500M based on the number of additional MOAs I had to dial in vs what my 55 grain loads require.
Accuracy was acceptable in the 14.5" (the LW shoots good, but is hard to shoot good if you know what I mean.) A 5 shot group ran 2.4".
A 10 round group in the 18" Noveske SPR barrel put 9 of 10 in 1.25" at 100 Yds with an extreme spread of 1.65". With me on the trigger, this is very good accuracy.
Evil1969SS>LS6
05-08-11, 18:41
I'm sure many of you are familiar with the Speer Gold Dot 24448 and how it performs, well Doc's post in this thread made my decision to pick up the XM223SP1 since its so much cheaper...
https://www.m4carbine.net/showthread.php?t=73955
Yup...and that's the reason I've been stocking up on this round. Perfect for use through both my BCM 14.5 mid-lengths ;)
Would it be correct to assume the 20" rifle the data was taken from has a 5.56 chamber?
Would it be correct to assume the 20" rifle the data was taken from has a 5.56 chamber?
Not really sure what difference that would make as the ammo is .223 pressure and not 5.56...am I missing something? :confused:
Would it be correct to assume the 20" rifle the data was taken from has a 5.56 chamber?
Yes, per my original post where I indicated it was a 5.56mm.
Not really sure what difference that would make as the ammo is .223 pressure and not 5.56...am I missing something? :confused:
223 ammunition would have lower pressures and velocities in a 5.56 chamber (as it has a longer leade) than it would in a 223 chamber. I don't know about all 5.56 ammunition, but the Federal 5.56 with the 55 gr bullet is loaded to a longer OAL than the Federal 223 with the same bullet
223 SAAMI pressures are not necessarily lower than 5.56 NATO pressures as they are measured differently
Yes, per my original post where I indicated it was a 5.56mm.
D'OH!! I missed that
223 ammunition would have lower pressures and velocities in a 5.56 chamber (as it has a longer leade) than it would in a 223 chamber. I don't know about all 5.56 ammunition, but the Federal 5.56 with the 55 gr bullet is loaded to a longer OAL than the Federal 223 with the same bullet
223 SAAMI pressures are not necessarily lower than 5.56 NATO pressures as they are measured differently
D'OH!! I missed that
Interesting...I didn't know that.
Thanks!
Upon further study of the difference between the Federal 223 & 5.56 ammunition, it's come to my attention a correction to my earlier post is in order-
It appears Federal either uses two different types of 55 gr bullets when loading the 223 & the 5.56 or uses the same bullet but with the cannular in a different location. The cannular of the 5.56 bullet is further back from the bullet's tip
I chronographed lot number 49Q660X005 this morning in a 14.5" DD LW and a 16" Noveske N4 Light. Both are chrome lined barrels. From a velocity standpoint the 14.5" gun was surprisingly slow at < 2,500 FPS. Not sure if it's a slow barrel or if the powder does not perform well at this barrel length.
Temp: ~56*.
Altitude: 5,000'
PACT Chronograph at 10'.
Wind 10+ early. Worse later.
14.5 DD LW - 10 shot string:
(Cold/Dirty barrel.)
Avg - 2,469 fps
H - 2,564
L - 2,405
16" N4 Light - String 1; 11 shots:
(Cold/Clean barrel).
Avg - 2,583
H - 2,622
L - 2,518
[16" N4 Light - String 2; 10 shots:
(Cool/Dirty barrel).
Avg - 2,586
H - 2,629
L - 2,548
It's interesting that the 16" barrel ran over 100 fps faster. This makes a huge difference if shooting any distance at all.
With the 16" N4 and Aimpoint Micro, I got a rough 200M zero using +2" high on the 100 Yd gong. I was then able to get consistent hits by going to the top edge of an 18x18" gong at 300 Meters. Warm and fuzzy on this part.
Temp = 58F
Elevation = 1300'
prochrono @ 15'
Federal XM223SP1
62gr bonded .223
20" Colt 5.56mm 1x7", freefloated with 3x9 Nikon Scope
Lot # 49P659X005
2777
2743
2760
2751
2778
-------
2762 fps ave (relatively mild for a 20" barrel)
I'm really interested in seeing the velocity out of a 10.5".
I would think that the velocity would still be high enough to expand reliably, but hopefully I could get a good 100 yds out of it (ballistics wise)
Tyrantresister
08-05-11, 10:47
What were your results, velocity and otherwise, from the 18" barrel, shootist?
What were your results, velocity and otherwise, from the 18" barrel, shootist?
I did not chronograph with the 18" SS barrel, just the 14.5" DD and 16" N4. The 18" gun is my long range gun and stays sighted with 77 grain ammo. The slower 62 grain bonded does not fit with my intended purpose for this gun.
I did shoot it in the 18" barrel to check the flash in our 100 Yd tunnel. The only light was from (sunlight) at the far end of the tunnel; near complete darkness in the shoot-house. Flash with the 62gr bonded was visible, but very low thru the 18" with Rainier XTC comp; and was slightly less than with B.H. Mk262.
Bonded 62 gr flash was also very low in the tunnel using a BC 1.0 I had on the 16" N4 barrel at the time.
I shot most of my initial purchase of 400 rounds (mostly using the 14.5" gun with a magnified optic) plus the 16" gun with Micro Aimpoint. I've added another 500 rounds since and have since switched the optics between the two rifles and re-sighted. It has good accuracy in both (~2 MOA) with minimal windage differences - it just prints a little lower at 100 (and a lot lower past 300).
After 300 Meters the drop is severe. 2" high at 100 Yds is approximately a 150 Yd zero (verified on a 150 Yd steel gong that is only partially visible). Hits on an 18" gong at 300M are easy and consistent using top-edge holdover - this with the Micro Aimpoint that now sits on the 14.5" gun. It's a poor choice for anything longer, IMO.
I've had zero malfunctions with the 62 gr bonded and my primary SD house gun, the 14.5" DD Middy, is now loaded with it. I do wish it had more zip, but at $.50/round, if something better comes along at a reasonable price, it's very suited for use in our CQB 3-Gun matches.
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