Hornady CX 190 gr 30 cal

[Moose47]

Peter thanks for taking the time to post your CX testing results. I see your COAL 3.500 is Hornadys recommended length from their latest load data for the 190 CX and your 80 Grains of Mag Pro is the max load that the Nosler #9 book suggests. Peter do you have any RL 26 that you can try since that powder seems to be showing some improved data for the 300WM.
Can you tell me the rifle you are using and does it have a detachable magazine. I would assume it does since you are able to test such long rounds, IE 3.500 or longer.
I just purchased some 190 CXs and I will be following this thread, your providing great info. My shooting range here in Alaska is closed for the month of December so my testing will be on hold. My rifle has a detachable magazine so I will be able to use the 3.500 COAL also.

 

[Peter.Kansas]

Peter thanks for taking the time to post your CX testing results. I see your COAL 3.500 is Hornadys recommended length from their latest load data for the 190 CX and your 80 Grains of Mag Pro is the max load that the Nosler #9 book suggests. Peter do you have any RL 26 that you can try since that powder seems to be showing some improved data for the 300WM.
Can you tell me the rifle you are using and does it have a detachable magazine. I would assume it does since you are able to test such long rounds, IE 3.500 or longer.
I just purchased some 190 CXs and I will be following this thread, your providing great info. My shooting range here in Alaska is closed for the month of December so my testing will be on hold. My rifle has a detachable magazine so I will be able to use the 3.500 COAL also.

The rifle I have is a Bergara with a detachable magazine that can be loaded out to 3.55.
I do not have any R 26 and had to work up loads off of research and estimates.
It seems to me the bullet likes jump and under max loads. At 2900-2950 it is solid out to 500 at 1325 yards I saw erratic impacts 6 ft off of target.

 

[Moose47]

Peter some interesting info I'm finding is the difference in length between the Barnes LRX and the CX bullet. LRX @ 1.574 vs CX 1.654 . The ogive portion of the CX is like .080 longer that the Barnes LRX . So if a persons rifle only alows bullets up to the max COAL of 3.340 this bullet seating would take up alot of powder space in the case. Maybe this is the reason were not seeing the 190 CX in the Outfitter line of ammo yet.

 

[Peter.Kansas]

I think I'll load up my last 32 at 79.5 grns MPRO and 3.55 COAL it gave the best ES/SDs. And see if I can get it dialed in.

 

[Moose47]

Cool, hope they shoot well! Got some 190s loaded last night. 190CX, 215 Federal, 3.50 COAL and 79 grains RL 26. This COAL 3.50 gives .160 of the lands for my 300WM.

 

[Peter.Kansas]

Cool, hope they shoot well! Got some 190s loaded last night. 190CX, 215 Federal, 3.50 COAL and 79 grains RL 26. This COAL 3.50 gives .160 of the lands for my 300WM.

Let me know how they shoot, I'd like to get them tuned in. If they do, it will be a great round.

 

[Peter.Kansas]

Couple notes with the .308 190CX load in my 300WM Bergara, these are not SAAMI spec loads.
per Hornady 2000fps is the minimum impact velocity which is 600 yds @2950 fps

using SHOOTERSCALCULATORS.COM and having confirmed at 1325 yards the load has the same identical trajectory as my 190 Sierrra matchking load.

Best grouping load to date
190CX
HDY BRASS
WLRM
66.0 gr IMR 4451
COAL 3.551
@2923fps SD11.4 ES20.3
60 degrees

I've tested the following loads at 3.551 COAL from 65 grs IMR 4451 to 68 at .03 grains with 66 being the best Load

IMR 4831 @ 70.5 =2963 w/sd of 7.1 good load

MPRO @ 79.5 = 2978 w/sd of 5.6 good load

SHOT 12-02-22 following load
190CX
GRAF BRASS
WLM Primer
80grs MPRO
COAL 3.735
10 degrees Fahrenheit 2400 ft @3000fps accuracy was marginal 2.5 inch groups

summery

for the length of the bullet and 600 yards being minimum expansion limit I would look at a lighter copper bullet/higher velocity or a berger 205 elite hunter in the 300 WM

Peter some interesting info I'm finding is the difference in length between the Barnes LRX and the CX bullet. LRX @ 1.574 vs CX 1.654 . The ogive portion of the CX is like .080 longer that the Barnes LRX . So if a persons rifle only alows bullets up to the max COAL of 3.340 this bullet seating would take up alot of powder space in the case. Maybe this is the reason were not seeing the 190 CX in the Outfitter line of ammo yet.

Tested CX190 loads today at -10 degrees
With WLR primers and 79.5 grs MPro 77.5 MPro and 72.5 IMR 4831
All fired with no issues and all hit center steel plate at 300 yards.

 

[Moose47]

Finally got some intial data for some RL 26 / 190CX vs 190LRX
I loaded 79gr of RL26, Fed215 primers with both loads .100 of the lands.

190CX @3118, 3885 ft,lb
190CX @3134, 3925 ft,lb
190CX @3114, 3875 ft,lb

190LRX@3173, 4023 ft,lb
190LRX@3138, 3935 ft,lb
190LRX@3190, 4066 ft,lb,

Using Shooters Calculators.com the following data was developed:

For the 190CX with an average velocity of 3120FPS, zeroed at 300yards sighted at 3.11 inches at 100yards energy would be 3717/ 2968 FPS
300 yards would be 3031 energy/ 2680FPS. At 400 yards energy2728/2543 FPS/ bullet drop - 8.54

For the 190LRX with an average velocity of 3150 FPS zeroed at 300 yards sighted at 3.06 inches at 100 yards energy would be 3766/ 2988 FPS
300 yards would be 3033 energy/ 2681 FPS. At 400 yards energy 2712/ 2535FPS/ bullet drop 8.53

What's interesting is that even though the LRX showed an increased average velocity both bullets show almost identical performance at the
400 yard range. Bullet drop -8.54 vs -8.53// energy 2728 vs 2712// FPS 2543 vs 2535.

Accuracy for both was around 1.25 with the CX being a little better.

Overall I would say using the RL 26 powder with either of these bullets would be an awesome hunting load. I think some would say this data would be what you expect from a 300 Weatherby. Lastly all of this comes from the Ballistic Coefficients of these high performance copper bullets IE
CX @ .575// LRX @.541.

 

[nksmfamjp]

Accuracy for both was around 1.25 with the CX being a little better.

Is that 100yd group size? How many shots? Is that good for that rifle?

 

[CMP70306]

Hornady has now released data for the 190grain CX with the 300WinMag and 300WBY. Interesting to note the suggested COAL for the 300 WM is 3.500 which will be to long to feed in many actions. If your rifle is a magazine type feed your probably okay. Hornady also recommends 20 to 30 of the lands which will not work for some actions. Overall good to see some info for the new CX bullets. I will be loading the 190 in both the WM and WBY

The reason for the long COAL is due to the bullet being designed for the 300 PRC which has a 3.55 COAL. This allows it to take advantage of the extra mag space since the 180 CX can't be loaded long due to its shape impacting the lands at much over a 3.34 COAL.

I just ran into this issue with a buddy, he is running AICS mags so after finding out the 180's were limited by the chamber rather than the mag I told him to pick up the 190's as the extra case capacity could probably get them to the same speed but with significantly greater down range performance due to the much higher BC. Didn't get a chance to load for him this week so we probably won't get to test them until February.

 

[Moose47]

Is that 100yd group size? How many shots? Is that good for that rifle?

Yes 100yd group size, total of 6, 3CX and 3LRX. This was an intial test for the powder, RL26, to determine what velocity would result. My goal now will be to adjust the distance from the lands for the best accuracy. As a note the CX group had 2 shots touching and one flyer about 1 plus inches away so I would think the CX has the potential to be sub MOA. Also as a hunter I limit myself to shots within 300 yds so both of these loads are well within the accuracy range that I would. If your goals include shots beyond 400yards you would want to get closer to MOA groups.

 

[Moose47]

The reason for the long COAL is due to the bullet being designed for the 300 PRC which has a 3.55 COAL. This allows it to take advantage of the extra mag space since the 180 CX can't be loaded long due to its shape impacting the lands at much over a 3.34 COAL.

I just ran into this issue with a buddy, he is running AICS mags so after finding out the 180's were limited by the chamber rather than the mag I told him to pick up the 190's as the extra case capacity could probably get them to the same speed but with significantly greater down range performance due to the much higher BC. Didn't get a chance to load for him this week so we probably won't get to test them until February.

Great explanation, my 300WM magazine alows me to load at the 3.555 COAL or longer.

 

[Ftothfadd]

Hornady has now released data for the 190grain CX with the 300WinMag and 300WBY. Interesting to note the suggested COAL for the 300 WM is 3.500 which will be to long to feed in many actions. If your rifle is a magazine type feed your probably okay. Hornady also recommends 20 to 30 of the lands which will not work for some actions. Overall good to see some info for the new CX bullets. I will be loading the 190 in both the WM and WBY

Where did you see hornady loading 190grain CX in 300 WBY? I can only find info on the 180 CX in that cartridge.

 

[Moose47]

Where did you see hornady loading 190grain CX in 300 WBY? I can only find info on the 180 CX in that cartridge.

Its on their load data page as a PDF.