6XC IMR4350 115gr DTAC Load Data For Those Interested

[ballisticxlr]

I had an issue with H4350 availability but had a ton of IMR-4350 on hand. I searched and searched fot 6XC load data with 105+gr bullets but found exactly nothing. So I looked at 6CM and 6x47L data and burn speed, bulk density and energy content and made a guess. My guess worked better than I'd hoped.

The load below was safe in my rifle. Your mileage may vary. Start at least 2 grains lower and work up.

Case: Norma LRP
Bullet: 115gr DTAC
Powder: IMR4350
COAL: 2.74
Primer: Federal 210
Charge: 39.5gr
MV: 3050 avg
SD: 7FPS
Barrel: 25.5" Columbia River Arms 3-land polygonal

I see the question asked constantly about IMR-4350 vs H4350. Nobody ever has the answer for IMR4350, they just say, "go get H4350." but that's both glib and unhelpful. With an identical load of H4350 I get 2980fps with similar SD's and an identical POI. Group size with both powders was identical, 5 shots into half an inch, 10 shots into 3/4" from a bench.

Yes, H4350 is more temp stable but sometimes you just have to run what you brung.

 

[luckyshot52]

What twist barrel

 

[Evan]

I put this in the other thread:

IMR-4350 is a most excellent powder! It has produced stunning accuracy and great velocity in my 30-06s and my 6.5 creedmoor. It also has always been on the shelf at my gun store, which should never be taken for granted!

I think IMR powders are entirely under-appreciated around here. I've achieved better accuracy from 4350,4320, and 4064 in various cartridges than from any of the more modern powders. Maybe I'm in a unique situation, but I haven't seen real problems with temp sensitivity with them; POI does not really seem to wander appreciably and my tune windows seem be nice and wide.

 

[ballisticxlr]

What twist barrel

8 twist. Just did a long range match with that load yesterday. The weather was cold all day with a 1500ft DA and the gun was a laser, metaphorically speaking.

 

[urbanrifleman]

they just say, "go get H4350." but that's both glib and unhelpful.

Glib and unhelpful is the new self perceived achievement aristocracy. Just an observation.

Good post. I kind of figured. Need to test the Accurate version too

https://www.midwayusa.com/product/2183288203/accurate-4350-smokeless-gun-powder

It's on sale too!!!

 

[r bose]

Glib and unhelpful is the new self perceived achievement aristocracy. Just an observation.

Good post. I kind of figured. Need to test the Accurate version too

https://www.midwayusa.com/product/2183288203/accurate-4350-smokeless-gun-powder

It's on sale too!!!

Ironic you mention AA 4350. I have several friends using it in 6.5x47, 6.5 CM, and 6x47, 6XC, getting excellent results. They find it a bit slower than IMR and H

 

[urbanrifleman]

Ironic you mention AA 4350. I have several friends using it in 6.5x47, 6.5 CM, and 6x47, 6XC, getting excellent results. They find it a bit slower than IMR and H

Accurate has changed suppliers in the last decade and is getting some incredible powder. Across the board.

 

[Deton8tor]

I have had 3 6xc's and all 3 shot IMR4350 better than the H. I got better numbers, accuracy and velocity with IMR4350. I shoot that powder in my .260 with 123 Scenars and it is a shooting son of a gun!

 

[Damon555]

I searched and searched fot 6XC load data with 105+gr bullets but found exactly nothing. So I looked at 6CM and 6x47L data and burn speed, bulk density and energy content and made a guess.

I just used the very same comparison for some 6XC load data with 87 grain Vmax and RL15. There is scant 6xc load data out there with a select few powders....Looking over the 6CM loads it appears that the max is, on average, about 1-2 grains above the max 6XC loads.....depending on the powder.

The abundance of 6CM data has helped me develop some pretty good 6XC loads that I otherwise wouldn't have known where to start or stop. So many more powders will work with the 6XC than are listed in the manuals......

 

[xswanted]

I had an issue with H4350 availability but had a ton of IMR-4350 on hand. I searched and searched fot 6XC load data with 105+gr bullets but found exactly nothing. So I looked at 6CM and 6x47L data and burn speed, bulk density and energy content and made a guess. My guess worked better than I'd hoped.

The load below was safe in my rifle. Your mileage may vary. Start at least 2 grains lower and work up.

Case: Norma LRP
Bullet: 115gr DTAC
Powder: IMR4350
COAL: 2.74
Primer: Federal 210
Charge: 39.5gr
MV: 3050 avg
SD: 7FPS
Barrel: 25.5" Columbia River Arms 3-land polygonal

I see the question asked constantly about IMR-4350 vs H4350. Nobody ever has the answer for IMR4350, they just say, "go get H4350." but that's both glib and unhelpful. With an identical load of H4350 I get 2980fps with similar SD's and an identical POI. Group size with both powders was identical, 5 shots into half an inch, 10 shots into 3/4" from a bench.

Yes, H4350 is more temp stable but sometimes you just have to run what you brung.

Good info to have.

I changed to H4350 in BR cases based only on the fact that it’s easier to fit enough in there compared to IMR.

As far as temp stable........I load IMR4350 in my 260.

I had chrono data written down from 83 degree weather.

So last winter at -14F I decided to give it a try. Left the gun and ammo outside for 1 hour and fired 5 rounds over the lab Radar.

83 degree speed avg was 2680
-14 degree speed abc was 2670

I’m satisfied with that for a nearly 100 degree swing.

I think it’s possible the “extreme” powders May have a slightly better lot to lot consistency but that’s about it.

 

[Dusty Stevens]

I was gonna mention imr 4350. It should be perfect or h1000