View Full Version : 75gr Gold Dot .223 (data-dump, more to come)
I fired several rounds today. Function was good, and recoil impulse was more of a "shove". Hard to explain, but it felt like I was moving more than M193 down the barrel, but not snappy.
I fired 2 rounds into milk jugs full of water, at 15m distance, from a 16.1" DDM4 with a Surefire 556-212 suppressor in place. Both rounds performed identically, penetrating 3 jugs fully, and bouncing off of the far inside wall of the 4th jug trying to get out, but not quite making it.
Bullet #1 measures 0.557" at the widest point, and 0.365" at the narrowest point (a juncture between petals), for an average diameter of .461". It is 0.378" high from the front of the mushroom, to the base of the bullet shank, although petals have folded beyond the base of the shank.
Bullet #2 measures 0.5415" at the widest point, and 0.355" at the narrowest point (a juncture between petals), for an average diameter of 0.448". It is 0.379" high from the front of the mushroom, to the base of the bullet shank, although petals have folded beyond the base of the shank.
I am sending some Gold Dot to be evaluated at low impact velocities in gel, chronographed (The data I now have, shows, 2199fps from a 10.5" barrel, and 2419fps from a 24.5" barrel, and gel/animal data is forthcoming.) and shot into hogs and deer.
The Gold Dot has a sealed and staked primer, and no neck sealant.
http://i67.tinypic.com/23w9mxs.jpg
http://i67.tinypic.com/f5blev.jpg
I regressed Speer's data on the 75gr Gold Dot, and achieved a functional BC of 0.4.
I verified this by plugging in 0.222 for their 55gr load, and 0.27 for their 62gr load (this is the 64gr load's published BC).---These are published BC's.
I checked all residual velocities at 300 yards with the calculator. Using the above data, All of the loads were within a dozen FPS of the published data, using published MV.
It seems for all the world that Speer is claiming a 0.4 +- 0.01 BC for their 75gr load. I have not found it published, but the velocity data regressed indicates such, directly.
Feel free to check my work.
http://i63.tinypic.com/29z5t0n.jpg
http://federalpremium.com/downloads/catalog/LE/le-issue/index.html
*The 75gr Sciroco II is 0.419, and the GD looks at LEAST as streamlined, with a slightly blunter tip...so maybe it's legit?
Here is a revised chart, using 0.4 as the BC.
http://i63.tinypic.com/30htpao.jpg
Today, I fired a round into water jugs (milk-jugs) at a paced 95m. My paces are pretty accurate (about 10m +- over 400m, measured w/surveyor wheel, numerous times, when I lived out in S TX). I used my 16.1" DDM4, suppressed. The round expanded VIOLENTLY, and penetrated the same number of jugs as at 15m. Three, with the round coming to rest in the 4th, after ALMOST breaking out of the outer most side. The bulk of the fragments shown were found in the 2nd and 3rd jugs. This round is still moving "too fast" at 100ish yards to retain 100% of its mass. It is my opinion that the BC really is around 0.4, and this round has some legs on it!
Here it is, shown next to the one fired at 15m, for reference (the fragmented round is, ironically, the one fired at 100-ish yards):
http://i67.tinypic.com/10n59bl.jpg
http://i64.tinypic.com/1vjih.jpg
http://i67.tinypic.com/2wew6lf.jpg
Eta: official BC is 0.373
ColtSeavers
12-07-15, 22:33
Holy crap, I never knew this existed! This could be the bullet to rule them all? Fantastic BC, bonded, heavy grain for caliber, just need to get some precision shooting testing on it. Time to pull out the credit card... again...
Thank you very much for the work/info! Extremely excited to find out more about this round.
Holy crap, I never knew this existed! This could be the bullet to rule them all? Fantastic BC, bonded, heavy grain for caliber, just need to get some precision shooting testing on it. Time to pull out the credit card... again...
Thank you very much for the work/info! Extremely excited to find out more about this round.
Shoots 1/2 MOA or better at 100 yards per one of the guys I sent some to. 16" custom M700.
ColtSeavers
12-07-15, 22:46
Shoots 1/2 MOA or better at 100 yards per one of the guys I sent some to. 16" custom M700.
You sir, are mean. :p
ETA: As in that is great news and I now have to fight the urge to look at the bank account before getting some.
Very interesting and thanks for taking the time to post this. I'm curious to see what the lower expansion threshold is. This round has huge potential as is should be good at everything. I'd expect price and performance to be better than 70gr tsx, but we shall see.
Very interesting and thanks for taking the time to post this. I'm curious to see what the lower expansion threshold is. This round has huge potential as is should be good at everything. I'd expect price and performance to be better than 70gr tsx, but we shall see.
Price is $0.85/rd
Thanks for the info. This looks very like a promising competitor to the 70 TSX and GMX. With potentially better price and availability. Hmmmm practice with 75gr steel match and defend with this.
vicious_cb
12-09-15, 21:03
Price is $0.85/rd
Where did you find this stuff?
At the risk of veering far off track, how would this compare to the 90gr 6.8 Gold dots (XM68GD)? Obviously a touch bigger in weight and caliber, but is it enough to 'make the jump' to the 6.8 band wagon?
civiliansheepdog
12-10-15, 20:29
At the risk of veering far off track, how would this compare to the 90gr 6.8 Gold dots (XM68GD)? Obviously a touch bigger in weight and caliber, but is it enough to 'make the jump' to the 6.8 band wagon?
Makes you really wonder, doesn't it? I mean, with all the improvements every year on the 5.56, it seems 6.8 is being relegated to hogs and dear and not so much HD.
Failure2Stop
12-10-15, 21:47
I am sending some Gold Dot to be evaluated at low impact velocities in gel, chronographed (The data I now have, shows, 2199fps from a 10.5" barrel, and 2419fps from a 24.5" barrel, and gel/animal data is forthcoming.) and shot into hogs and deer.
24.5" barrel?
That doesn't happen to be a "14.5" typo does it?
24.5" barrel?
That doesn't happen to be a "14.5" typo does it?
You are correct. My error.
Btw, friend shot a deer with it. 142 yards. I'll post pictures when I get home.
Failure2Stop
12-13-15, 00:11
You are correct. My error.
Btw, friend shot a deer with it. 142 yards. I'll post pictures when I get home.
Looking forward to pics.
Just for you, I'll agonize over uploading them while mobile. Still at my vtac nf course until Monday am.
Where she was hit:
http://i67.tinypic.com/33b260w.jpg
Lung:
http://i63.tinypic.com/2eb6flf.jpg
Entrance:
http://i65.tinypic.com/25t8gf9.jpg
Entrance from inside:
http://i65.tinypic.com/10fu8g7.jpg
Exit:
http://i67.tinypic.com/e66dj4.jpg
Failure2Stop
12-13-15, 12:42
Groovy pics.
Hope you enjoy the course, Kyle rocks.
vicious_cb
12-13-15, 16:23
Looks like a lot of damage there, on par with a 70gr TSX. Any chance he recovered the bullet?
Looks like a lot of damage there, on par with a 70gr TSX. Any chance he recovered the bullet?
No bullet recovery. His commentary was that damage was nice, but browntip tears up internals a bit more. He likes it better than 70gr gmx though.
This was fired from a 7.5" pistol into gel. I do not know how "calibrated" or what exact type of gel it was. The impact velocity was roughly 1850fps. I will post video as soon as it's edited and up.
http://i64.tinypic.com/ririfd.jpg
ColtSeavers
12-18-15, 09:27
Looking forward to the video and thank you for all the info on this round so far.
I would like to see the bullet sold as an individual component for reloaders
civiliansheepdog
12-19-15, 08:27
I would like to see the bullet sold as an individual component for reloaders
+1 Hopefully so.
ColtSeavers
01-04-16, 23:41
Any updates to add by any chance? Video still intended?
Not trying to be a rude beggar, just still interested is all.
This was fired from a 7.5" pistol into gel. I do not know how "calibrated" or what exact type of gel it was. The impact velocity was roughly 1850fps. I will post video as soon as it's edited and up.
is that bullet a 70gr gold dot?
are there any accuracy tests on the 70gr gold dot?
75gr gold dot, and nothing official, but I am hearing half moa from the guy I sent it to. That said, he's a solid trigger puller and his rifle is a custom bolt gun
so no expansion from a 70 gr gold dot at 1800? arent the 64/62gr gold dots and fusion rounds supposed to open at that low of velocity?
thanks.
Shot some boneless pork shoulder at 25 yards with my 16.1". Was about 10" of meat, backed by water jugs. This slug punched the meat (haha! Sorry...) and then went through 1 complete jug, and stopped in the second. I was able to shoot this setup twice, with identical results. I found only 1 or 2 specs of lead in the pork shoulder. I think that the earlier test I performed where I had thought the slug had fragmented, I must have hit the board.
http://i67.tinypic.com/2epllpx.jpg
Also, as to the expansion testing at reduced velocity, the 55 and 62gr loadings expand very well down to 15-1800fps. I do not think that the 75gr loading is THIS much of an exception. I reviewed some of the other test data that was generated for me by this source, and noted that the 70gr TSX I sent which was fired into gel at an impact velocity of almost 2300fps fps also failed to expand, which lends to my thoughts that it is possible that the consistency of the gel used, may not be 100% representative of what one should expect in all cases.
ColtSeavers
01-08-16, 10:31
Thank you for the update!
MarshallDodge
01-22-16, 15:31
Here are my test results from last July-
With the angle of the sun late in the day, my chrono only gave me one readout from 5 shots, from each rifle. Rifles were bench rested on a bipod and rear bag.
Test 1:
16" 1:8 twist stainless, mid-length AR, 5.56 chamber
Distance:50 yards
5 shots total, chrono reading was on shot 5 at 2643 FPS
Zero function issues.
Target:
https://s3.amazonaws.com/tightgroup/g/targets/vtac55fmj50yards.jpg
That isn't a group that I am especially proud of. Paper shows 4 shots as shot 5 I tried shooting off target toward the upper portion of the chrono screen area to see if the chrono would read on shot 5, and it did. Shot 4, the low one in the group, was probably my fault.
Test 2:
24" Tikka Sporter 1:8 twist, 223 chamber
Distance: 100 yards
5 shots total, chrono picked up shot 3 at 2802 FPS
No function issues, sticky brass, etc.
While this is only one 5 shot group, I was really impressed with the accuracy of this ammo. Even with the cold bore shot(top hole), the group measured .594", just over 1/2 MOA:
https://s3.amazonaws.com/tightgroup/g/targets/tikkasporter75golddottarget1.jpg
Not a great test but at least a glimpse of the velocity, accuracy, and function of this ammo.
ColtSeavers
01-24-16, 10:38
Thank you both for all the info thus far on this round! More corroborating testing and I might end up switching to this from MK262.
2643fps at 50 yards from a 16" barrel for a 75gr bonded .223 is great.
Any update? Looks like a great round, but I am not seeing much in field use popping up on the web (other then WS6 friends deer kill).
Any update? Looks like a great round, but I am not seeing much in field use popping up on the web (other then WS6 friends deer kill).
It may take a while. The 75gr Gold Dot is a fairly recent release.
BufordTJustice
01-28-16, 15:45
Yeah. Color me interested. This and 70gr GMX are poised to offer some serious real world performance from 0-300+ yards.
The gold dot seemed more destructive than the gmx load based on deer a friend if mine shot. Thus far, everything I am getting in the 75gr gold dot load is a huge positive. Some of it can't be posted, some can. Suffice to say, many departments are going to this, some frome le223t3, and cost is not the driving factor , though it is nice.
BufordTJustice
01-28-16, 16:37
The gold dot seemed more destructive than the gmx load based on deer a friend if mine shot. Thus far, everything I am getting in the 75gr gold dot load is a huge positive. Some of it can't be posted, some can. Suffice to say, many departments are going to this, some frome le223t3, and cost is not the driving factor , though it is nice.
I've had excellent experiences with 70gr GMX on hog. So, if the gold dot can improve upon that, so much the better.
Would you be able to share more via PM? I understand OPSEC being in play.
ColtSeavers
01-28-16, 17:56
I can wait, I already made my ammo purchases for the next 6 months of 2016. But definately 'subscribed' as I'm willing to consolidate to one round to actually do it all.
https://scontent-ord1-1.xx.fbcdn.net/hphotos-xla1/t31.0-8/12719345_794659535361_5391130030557234490_o.jpg
ColtSeavers
02-09-16, 12:25
https://scontent-ord1-1.xx.fbcdn.net/hphotos-xla1/t31.0-8/12719345_794659535361_5391130030557234490_o.jpg
Nice!
I have 200 rounds of the GD 75 grn. Can't wait to try this round out.
Sent from my SM-G920V using Tapatalk
Just came in today! Wind is crazy so any kind of accuracy testing will have to wait.
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FlyingHunter
02-20-16, 10:36
And where are you finding this ammunition in stock and available ?
Inkslinger
02-20-16, 10:43
And where are you finding this ammunition in stock and available ?
http://www.ammunitiondepot.com/223-Ammo-Speer-223-75-Gr-Gold-Dot-SP-24475-p/24475.htm
Bonefroggunclub.com
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Palmetto has is on sale right now. $15 a box. I grabbed two.
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i had the chance to print some of this ammo on paper today. i'm just an average shooter, laying in the bed of my truck with bipod on the rifle and a sand bag for a butt stock rest.
shooting was with an LWRC 18" DMR nitrided barrel/upper, gieissele 2 stage trigger, no wind, 2.5-8x mark 4 TMR reticle zoomed to 8x and a 100 yard distance.
from left to right, the ammo is; hornady super perf 5.56 75 gr....speer gold dot 75gr....IMI razor core 77gr SMK(which the rifle was zero'ed with)
the black dots at 2" diameter and i did not re-zero the scope for the hornady or speer, just amied for the center of each circle.
39095
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