6.5 Creedmoor shooters
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I will stick with RL26 for now as I said I have already broke 3000 FPS with it with a 140 gr bullet with no sign of over pressure, I believe I will be able to keep 143 ELDXes over 3000 fps as well and 147ELDM to better than 2950 fps as long as I can get them to shoot well. RL26 has high velocity with low pressure out of a 6.5 Creedmoor.
So far with RL26 and 140 RDF, Nosler Brass, BR2 primers seated to OAL of 2.870"
46 5 shot average 2805 fps Velocity to Charge Ratio 60.98
46.5 5 shot average 2846 fps Dynamic value 1.34%
47gr. 5 shot average 2881 fps Dynamic value 1.24%
47.5gr 5 shot average 2924 fps Dynamic value 1.30%
48gr 5 shot average 2968 fps Dynamic value 1.33%
48.5gr 5 shot average 3006 fps Dynamic value 1.38 %
no pressure signs
All shots verified with a Magnetospeed
Shot from a 26" barrel
I also believe I will be able to get 3050 fps with 49 gr of RL26 with a 140 ELDM
So far with RL26 and 140 RDF, Nosler Brass, BR2 primers seated to OAL of 2.870"
46 5 shot average 2805 fps Velocity to Charge Ratio 60.98
46.5 5 shot average 2846 fps Dynamic value 1.34%
47gr. 5 shot average 2881 fps Dynamic value 1.24%
47.5gr 5 shot average 2924 fps Dynamic value 1.30%
48gr 5 shot average 2968 fps Dynamic value 1.33%
48.5gr 5 shot average 3006 fps Dynamic value 1.38 %
no pressure signs
All shots verified with a Magnetospeed
Shot from a 26" barrel
I also believe I will be able to get 3050 fps with 49 gr of RL26 with a 140 ELDM
Well if you can get the accracey sure, 46.0 to 46.5 seems to be the sweet spot, I never played with seathing depth yet. I did play with primers some. All my velocity are with lab radar, 26 inch proof barrel.
For you guys looking for a powders other than h 4350, I would try imr 4955 it shot great in the 2750 to 2850 ranges in my guy, 26 did to up to 46.5
For you guys looking for a powders other than h 4350, I would try imr 4955 it shot great in the 2750 to 2850 ranges in my guy, 26 did to up to 46.5
Well that is the if for sure, so far I have just been testing for velocity and how pressures looked, the groups with all loads tested including the H4350 with the 140 RDF Noslers have been less than great.
Here are the H4350 loads
41 gr. 5 shot average 2674 fps Velocity to Charge Ratio 65.22*
41.5 gr 5 shot average 2720 fps Dynamic value 1.44%
42 gr 5 shot average 2758 fps Dynamic value 1.28%
42.5 gr 5 shot average 2796 fps Dynamic value 1.24%
All the loads at 100 yards where about 1-1.5" 5 shot groups, when I took off my muzzle break shooting with threads exposed, I shot 2 - 5 shot groups with 41gr of H4350, they measured .380" ctc and .685" ctc.
was having alot of mirage over the snow on a sunny day, but the 2 groups without the brake gave me hope.
The next time I went up for testing I had only the muzzle cap on and the groups were the same as with muzzle break on. The cap has a gap of about an 1/8" that I think is causing the problem. Took the cap off and it grouped better again. I will be trying different brakes and getting a cap that fits flush with the 11% crown, very odd because most info on brakes claim only POI changes and group size is not affected.
As I said I will be doing OCW testing with the RL26 and H4350 without anything on the barrel.
Here are the H4350 loads
41 gr. 5 shot average 2674 fps Velocity to Charge Ratio 65.22*
41.5 gr 5 shot average 2720 fps Dynamic value 1.44%
42 gr 5 shot average 2758 fps Dynamic value 1.28%
42.5 gr 5 shot average 2796 fps Dynamic value 1.24%
All the loads at 100 yards where about 1-1.5" 5 shot groups, when I took off my muzzle break shooting with threads exposed, I shot 2 - 5 shot groups with 41gr of H4350, they measured .380" ctc and .685" ctc.
was having alot of mirage over the snow on a sunny day, but the 2 groups without the brake gave me hope.
The next time I went up for testing I had only the muzzle cap on and the groups were the same as with muzzle break on. The cap has a gap of about an 1/8" that I think is causing the problem. Took the cap off and it grouped better again. I will be trying different brakes and getting a cap that fits flush with the 11% crown, very odd because most info on brakes claim only POI changes and group size is not affected.
As I said I will be doing OCW testing with the RL26 and H4350 without anything on the barrel.
Prieto9000
Well-Known Member
- Joined
- May 11, 2010
- Messages
- 579
I've been getting very nice groups with 3 port muscle breaks out of both my 6.5 cm. Fot my 6.5 GAP I've been using a snowy mountain break with great results also.
Nice information guys. I 'm at 42gn with RL17, but there is obviously MORE powders that work also! No visible or increased bolt lift with this load and my 10BA Stealth has a 3 port break. I do want to change out the Hornady brass for Lapua or Norma next though, probably the Norma? This is not necessarily a "hunt" rifle, more of practice rifle, I have an 7STW and 300RUM for that purpose. Just want a long range, low recoil, similar ballistic practice caliber.
Synced on: 2017-03-04 10:54:38
Series 2017-03-04_10_54_38 Shots: 5
Notes 6.5CM 143ELDX RL17 42
Min 2758 Max 2785
Avg 2769 S-D 11.1
ES 27
Shot Speed
1 2758 ft/s
2 2774 ft/s
3 2785 ft/s
4 2769 ft/s
5 2759 ft/s
Synced on: 2017-03-04 10:54:38
Series 2017-03-04_10_54_38 Shots: 5
Notes 6.5CM 143ELDX RL17 42
Min 2758 Max 2785
Avg 2769 S-D 11.1
ES 27
Shot Speed
1 2758 ft/s
2 2774 ft/s
3 2785 ft/s
4 2769 ft/s
5 2759 ft/s
Barrelnut
Well-Known Member
Just a word of caution with RL-17. I have used it with 6.5 Creed and 300 WSM with good success and speed. I have tested it for temp sensitivity and without doubt it is.
Some have had issues with RL-17. Especially in hot weather. RL-17 has a much longer powder curve that H4350. This is why RL-17 gives speeds that are quite impressive over things like H43540. Some RL-17 users get all gitty with it, and just keep adding more cause they see no pressure signs, them bam all of a sudden things are waaaay over pressure. It seems to be a trait of RL-17, not to show pressure until things are probably already way over. It is suspected this is due to it's long power curve and rather acute temp sensitivity.
You guys are working up some strong loads in fairly cold weather right now. Those loads may well be way over pressure in warmer weather.
IMO, Jasonco's loads seem sane at those speeds and levels though.
I don't know if RL-26 behaves the same.
Some have had issues with RL-17. Especially in hot weather. RL-17 has a much longer powder curve that H4350. This is why RL-17 gives speeds that are quite impressive over things like H43540. Some RL-17 users get all gitty with it, and just keep adding more cause they see no pressure signs, them bam all of a sudden things are waaaay over pressure. It seems to be a trait of RL-17, not to show pressure until things are probably already way over. It is suspected this is due to it's long power curve and rather acute temp sensitivity.
You guys are working up some strong loads in fairly cold weather right now. Those loads may well be way over pressure in warmer weather.
IMO, Jasonco's loads seem sane at those speeds and levels though.
I don't know if RL-26 behaves the same.
I am not sure about it's temp sensitivity either that is why I made sure the temp was up as I was checking pressures (it was 20 deg Far. that day). So I took them from a room at 70 deg Far. and kept them in my Truck with heater on max probably 85-90 deg, took them from truck 5 at a time put them into my pants pocket loaded one at a time into warm chamber and shot. That way I would have a better idea of pressure in warmer weather.
Creedmoor shooter
Well-Known Member
I work my rl-17 loads in the summer. I switch to h4350 for winter time. I've ran as high as 43 grains of rl-17 but settled on 42.
