IMR 4451 6.5 Creedmoor?

[gohring3006]

Any one using IMR 4451 in the Creedmoor using 130 AR match Hybrids?
I picked up 500 of the 130s and 8 pounds of the 4451.

 

[KPB71]

You might find some good info here http://65creedmoor.com/index.php

 

[Clark]

My guess is that if you work up to the threshold extractor groove dimension change anywhere around the groove [pre cursor to loose primer pockets] and back off 2 grains, that you will wind up with ~ 43.8 gr of IMR4451 for 65kpsi or back off 2.6 gr for ~43.1 gr for 62 kpsi per 6.5 Creedmore SAAMI registration for 6.5 Creedmore 130 gr. That is based on my jug of IMR 4166 that is 2015 date code.

Every year I try to build new rifles and work up new loads.
The IMR4451 and IMR4166 powders with anti Copper fouling and anti temperature change coatings have made a great improvement for me in 2015 and 2016. I can sight in a new barrel out to 500 or 600 yards and not have to clean the bore before hunting. With H4350 in 2014 I had to clean every 15 shots with a new gun using KG1, KG12, Witches Brew, and Alcohol. With the new IMR anti Copper fouling I was going 50 or 75 shots before hunting and there was no Copper in the muzzles.

2014
7mmRM 3.34" 140 gr nos bal tip moly 70 gr H4350 3400 fps chrono 26" barrel

2015
6.5-06 3.34" 120 gr nos bal tip moly 50.7 gr IMR4166 3197 fps chrono 24" barrel
300WM 125 gr nos bal tip moly 66 gr IMR4166 3174 fps chrono 22" barrel

2016
6mmBR 1.2" 95 gr Nos Bal Tip moly 29 gr IMR4166 2800 fps chrono 27" barrel
25-06 3.25" 115 gr Nos Bal tip moly 51.5 gr IMR4451 3185 fps chrono 26" barrel
308 2.85" 125 gr nos bal tip moly 47 gr IMR4166 2934 fps chrono 20" barrel
7mmRM 3.34" 140 gr nos bal tip moly 66.7 gr IMR4451 3384 chrono 28" barrel

 

[gohring3006]

My guess is that if you work up to the threshold extractor groove dimension change anywhere around the groove [pre cursor to loose primer pockets] and back off 2 grains, that you will wind up with ~ 43.8 gr of IMR4451 for 65kpsi or back off 2.6 gr for ~43.1 gr for 62 kpsi per 6.5 Creedmore SAAMI registration for 6.5 Creedmore 130 gr. That is based on my jug of IMR 4166 that is 2015 date code.

Every year I try to build new rifles and work up new loads.
The IMR4451 and IMR4166 powders with anti Copper fouling and anti temperature change coatings have made a great improvement for me in 2015 and 2016. I can sight in a new barrel out to 500 or 600 yards and not have to clean the bore before hunting. With H4350 in 2014 I had to clean every 15 shots with a new gun using KG1, KG12, Witches Brew, and Alcohol. With the new IMR anti Copper fouling I was going 50 or 75 shots before hunting and there was no Copper in the muzzles.

2014
7mmRM 3.34" 140 gr nos bal tip moly 70 gr H4350 3400 fps chrono 26" barrel

2015
6.5-06 3.34" 120 gr nos bal tip moly 50.7 gr IMR4166 3197 fps chrono 24" barrel
300WM 125 gr nos bal tip moly 66 gr IMR4166 3174 fps chrono 22" barrel

2016
6mmBR 1.2" 95 gr Nos Bal Tip moly 29 gr IMR4166 2800 fps chrono 27" barrel
25-06 3.25" 115 gr Nos Bal tip moly 51.5 gr IMR4451 3185 fps chrono 26" barrel
308 2.85" 125 gr nos bal tip moly 47 gr IMR4166 2934 fps chrono 20" barrel
7mmRM 3.34" 140 gr nos bal tip moly 66.7 gr IMR4451 3384 chrono 28" barrel

Very good breakdown, thanks

 

[dsculley]

Per Hodgdon's reloading site, 24" 1 in 8 Twist Barrel, Federal 210M:

Start Load of 37.5 Gr yields 2,479 f/s @ 47,800 PSI

Max Load of 41.7 Gr yields 2,735 f/s @ 59,500 PSI

FWIW,