Need a 6.5x47 starting load for H4350

[tammons]

I called hodgdon but they had no info.

Need a 6.5x47 lapua starting load for H4350, CCI BR$ primers, with 123 senecars.

After looking around at this site and the 6mmhot site, It looks like a good starting load might be 37-38 grains of H4350 up to a 42 grain max.

Any feedback is appreciated.

 

[Forum Boss]

Starting load for 123 Scenars: CCI 450s, 37 grains Reloader 15, work up your load. Some guys are running 39.5.

 

[jb1000br]

I should hopefully have an answer today...but with 130 Bergers...running 38.5-42 H4350 to see what happens.

JB

 

[tammons]

Shot 37-40 grains h4350 and 123 sencars br4 primers at the lands today for barrel breakin and got some tight groups.

Savage 12 in a weighted stock, 4 oz trigger, Off the shelf Shilen barrel from midway.

No pressure signs, but 37 and 39 grains were tight. 40 was a spead out so there should be another node a little higher.

Gusty winds from 10-20 mph.

Shots 6-10 were about .2-.3" at 50 yards.
Others at 100 yards were around .4" with an occational flyer.

 

[Mark Walker in TX]

I should hopefully have an answer today...but with 130 Bergers...running 38.5-42 H4350 to see what happens.

JB

Looking forward!! I just picked up a jug of H4350 myself to try with the very same Bergers.

 

[jb1000br]

ran out of daylight...no love. will report when I get them shot.

JB

 

[Mark Walker in TX]

Did some chrono work today with H4350 and Berger 130s.

Rifle is a f-class rig, 30" Krieger tube, CCI 450s, .289 bushing w/ .292 neck, all 5 shot groups.

85 degrees, 61% humidity, 30' elevation, 300 yard range.

38.5g
2764 avg
15.79 ES
6.48 SD
1.42" group

39.0g
2791 avg
9 ES
3.87 SD
1.41" group

39.5g
2847 avg
14.05 ES
6 SD
1.80" group

40.0g
2863 avg
20.39 ES
7.81 SD
.924" group

40.5g,begenning to compress)
2890 avg
19.31 ES
8.71 SD
1.03" group

41.0g
2920 avg
21.11 ES
8.48 SD
1.09" group

41.5g,heavily compressed)
2941 avg
8.57 ES
3.31 SD
.832" group
4 of the 5 shots into .330"

All in all, I had better luck with Reloader 15, but this was not bad for a very first time out.

 

[Forum Boss]

Walker,

Thanks for the info! Jason and Zak are both poised to start testing the 130s with H4350 very soon. RL15 worked very well, as you have observed, but we're curious to see if H4350 can match RL15's velocity with better temp stability.

Jason will also be testing the new Norma URP. It appears to be a bit more energetic than H4350, and has slightly tighter density, so we may be able to get to 2940 fps without compression.

Love your ES/SD with that 41.5gr load however! And the accuracy:

.832" group [@ 300 yards] -- 4 of the 5 shots into .330"

"Not bad" is being pretty modest!

Q 1: Any pressure signs at the upper loads?

Q 2: What action are you using and has the firing pin been bushed?,We have to be mindful of primer cratering on Zak's unbushed AI AW rifle. For Zak, the cratering, and not brass strength, appears to be the limiting factor. Jason has a Tannel-bushed firing pin on his Remington, so it's not an issue for him.)

 

[shcal]

I got out early today before the winds started and did some testing with H-4350. These are the best three loads. I started at 39.0 gr and went up to 42.2 gr. No sign of pressure whatsoever.

39.0 grs was very good. The four shots touching measured .282" all were shot at 100 yds. The one flyer was really me, I pulled and the second I did it I knew I screwed up! Oh well.
shcal

 

[Mark Walker in TX]

Walker,

Thanks for the info! Jason and Zak are both poised to start testing the 130s with H4350 very soon. RL15 worked very well, as you have observed, but we're curious to see if H4350 can match RL15's velocity with better temp stability.

Jason will also be testing the new Norma URP. It appears to be a bit more energetic than H4350, and has slightly tighter density, so we may be able to get to 2940 fps without compression.

Love your ES/SD with that 41.5gr load however! And the accuracy:

.832" group [@ 300 yards] -- 4 of the 5 shots into .330"

"Not bad" is being pretty modest!

Q 1: Any pressure signs at the upper loads?

Q 2: What action are you using and has the firing pin been bushed?,We have to be mindful of primer cratering on Zak's unbushed AI AW rifle. For Zak, the cratering, and not brass strength, appears to be the limiting factor. Jason has a Tannel-bushed firing pin on his Remington, so it's not an issue for him.)

Paul,

No pressure signs at all, easy bolt lift, no flattening, etc.

My rifle has a Panda F-Class action.



I was having trouble getting a consistent seating depth with the loads above 40.5 due to the compression. I will, however, try another .001 neck tension and see it that will hold them where I want them, and if it affects accuracy.

That will be the only way to get it up to where the RE15 was hitting the sweet spot at 2950 fps.

The ballistics on this load at 2950 sure look good compared to the 6.5x284...

With the RE15 my results looked like this, same parameters as above, also at 300 yards:

37.6g
2915 avg
18.24 ES
6.78 SD
1.75" & 1.205" groups

37.8g
2950 avg
15.91 ES
5.47 SD
.844" & .830" & .848" & .965 groups,I shot four x 5 as this looked most promising in earlier testing - proved so again)

38.0g
2975 avg
16.08 ES
6.16 SD
1.22" & 1.17" groups

38.2g - this was the top in my rig - hard bolt lift etc.
2981 avg
18.32 ES
6.32 SD
.886 & 1.45" groups

 

[Mark Walker in TX]

Jason will also be testing the new Norma URP. It appears to be a bit more energetic than H4350, and has slightly tighter density, so we may be able to get to 2940 fps without compression.

If it happens to fall right in between the H4350 and RE15, then it would be about perfect from a load density perspective. I will sure be interested in how it shoots!! There is a little extra capacity with the RE15 that I don't like, but it did not show it on the paper - and I guess that is what matters.

The fill issue on the H4350 has me thinking maybe 6.5x47-DX ...

 

[ghermitage]

Maybe it is time for a 6.5x47 Info Page to be started.

Kinda curious about what velocity might be expected from a 95gr bullet out of a 24" barrel.

 

[Forum Boss]

Jason will also be testing the new Norma URP. It appears to be a bit more energetic than H4350, and has slightly tighter density, so we may be able to get to 2940 fps without compression.

If it happens to fall right in between the H4350 and RE15, then it would be about perfect from a load density perspective. I will sure be interested in how it shoots!! There is a little extra capacity with the RE15 that I don't like, but it did not show it on the paper - and I guess that is what matters.

The fill issue on the H4350 has me thinking maybe 6.5x47-DX ...

Walker,

After hearing that both Zak and Jason were running out of room with the H4350 and that it appears to shoot better the faster you go, yes, a modestly improved case might be the ticket. Just another couple grains capacity should do it...

Also--Re the 6.5x47 Info page. That's in the works but we really want to sort out more data on the Berger, Norma, and JLK 130s. There appears to be a "low node" around 2870, but the higher node is tempting to chase, given the high BC of the 130s.

 

[Mark Walker in TX]

Walker,

After hearing that both Zak and Jason were running out of room with the H4350 and that it appears to shoot better the faster you go, yes, a modestly improved case might be the ticket. Just another couple grains capacity should do it...

Also--Re the 6.5x47 Info page. That's in the works but we really want to sort out more data on the Berger, Norma, and JLK 130s. There appears to be a "low node" around 2870, but the higher node is tempting to chase, given the high BC of the 130s.

Paul,

I have all three of those bullets on hand, if you want any other info, just let me know, I would be happy to contribute. You can email me at walkermarka@yahoo.com.

The JLK shot the best at:

38.0g RE15
2965 Avg
16.72 ES
5.38 SD
.971" & .583" 5 shot groups
.998" 10 shot group

 

[Forum Boss]

Walker,

Thanks for the info. We haven't been able to get our hands on the JLK 130s yet, but they shot well enough to win the NBRSA 600-yard Nat'ls and Don Nielson,match winner) promptly went and ordered 3000 more. So we can all stand in line.

Thanks for the load data. Definitely looks like there's a sweet spot right around 2950-2970. Same at for the 123s in a Rem 260, and the 142s in a 6.5-284.

Could this cartridge be a "giant-killer" with the 130s at 2950? I know we've got the attention of many of the tactical guys, who were just finally starting to think 260 Rem instead of .308. From all indications, the 6.5x47 is a 260 Rem in a smaller package, with, probably a bit better ultimate accuracy potential. Don Nielson said the JLK 130s were scary accurate.