RPR .243 Winchester too slow?

[DaveMarine1]

Ruger Precision .243 with 26" barrel 1:7.7 twist.
I am using Winchester brass, 105 Berger Hybrids seated to mag length which gives me a .030 jump. Used 44.3gr. of H4831SC with Wolf primer and found that over the Magneto Speed and only got a five round average of 2829 fps. The Berger book shows I should be at those speeds with 43.8 gr. of H4831SC with a 24" barrel.
Doesn't this seem too slow for a 26" barrel?
What have others seen when loading for the 105 Hybrid?
Thanks for taking the time to look.

David

 

[Eric Leonard]

I am shooting a 27 inch Krieger 8 twist .236 bbl,,my load is the 105 VLDH seated at 2.860 with a .020 jump,,WW brass and CCI 200 primers 41.5 H4350 is getting me 3200 fps over the magnetospeed and from a 100 yard zero is 21.5 MOA to 1,000 and will bang the crap out of the 10 inch plate,,

RL23 was pushing 3300 but would spike pressure when the bbl got hot so I switched to 4350

 

[DaveMarine1]

I am shooting a 27 inch Krieger 8 twist .236 bbl,,my load is the 105 VLDH seated at 2.860 with a .020 jump,,WW brass and CCI 200 primers 41.5 H4350 is getting me 3200 fps over the magnetospeed and from a 100 yard zero is 21.5 MOA to 1,000 and will bang the crap out of the 10 inch plate,,

RL23 was pushing 3300 but would spike pressure when the bbl got hot so I switched to 4350

What the heck. That is a good load and a good velocity. I was expecting to see 2950 at the least with my 43.9gr load of H4831SC.
It just seems like i am missing the boat on something.

 

[dkhunt14]

You only gain around 6.7 feet per tenth grain of powder. The difference between the 43.8 and 44.3 would only be around 33 feet. It could be due to a slow barrel, slow lot of powder or a few other things. One thing I noticed with the Berger Manual and the cartridges I load for is the manual is way on the safe side. I would take one case and try a little more powder while watching for pressure signs. Matt

 

[Cold Bore]

Sometimes I wish guys would just put their chronos away, develop loads that shoot for them, and stop fretting 50 FPS here and 100 FPS there.

They get wrapped up in a numbers game, and comparing their loads to whatever "everybody else" is getting.

Other than the speed issue, how does that load actually shoot for you?

 

[jsthntn247]

Ruger Precision .243 with 26" barrel 1:7.7 twist.
I am using Winchester brass, 105 Berger Hybrids seated to mag length which gives me a .030 jump. Used 44.3gr. of H4831SC with Wolf primer and found that over the Magneto Speed and only got a five round average of 2829 fps. The Berger book shows I should be at those speeds with 43.8 gr. of H4831SC with a 24" barrel.
Doesn't this seem too slow for a 26" barrel?
What have others seen when loading for the 105 Hybrid?
Thanks for taking the time to look.

David

44.6gr of 4831 gave me 2970 with a 115 dtac in a 24.5" barrel

 

[DaveMarine1]

Sometimes I wish guys would just put their chronos away, develop loads that shoot for them, and stop fretting 50 FPS here and 100 FPS there.

They get wrapped up in a numbers game, and comparing their loads to whatever "everybody else" is getting.

Other than the speed issue, how does that load actually shoot for you?

The load actually shoots really well. The 43.9 grains first time out shot 3/8 5 shot group at 100 yards!
I agree with the velocity game, in this case I am a victim of my own sayings...."that deer or target doesn't know the difference if it is hit at 2900 fps or if it is hit with 3100 fps" ha. The only thing is that I can't wrap my mind around that speeds according to the manual. I will try to bump it up and pay attention to pressures and see what happens. I would just like to have a little more velocity to take every advantage of the 6mm's BC in relation to others. Thanks for all of the information guys.

 

[MOShooter]

Sometimes I wish guys would just put their chronos away, develop loads that shoot for them, and stop fretting 50 FPS here and 100 FPS there.

They get wrapped up in a numbers game, and comparing their loads to whatever "everybody else" is getting.

Other than the speed issue, how does that load actually shoot for you?

I agree somewhat. With the PRS pushing ranges out to 1400y you need all the performance you can out of the 6mm bullets. However, speed without accuracy does you no good.

Scott

 

[Cold Bore]

To clarify my last post, I'd like to see a chrono that only provided ES and SD numbers, comparing shots against others in the string, but not provide actual FPS.

Use it to develop a consistent load, but not worry if your load is slower or faster than your buddies.

 

[dkhunt14]

To clarify my last post, I'd like to see a chrono that only provided ES and SD numbers, comparing shots against others in the string, but not provide actual FPS.

Use it to develop a consistent load, but not worry if your load is slower or faster than your buddies.

The only thing I see about that is sometimes the best ES and SD is not the best load for long range. Plus I need to know the average velocity for my click chart. Matt

 

[Cold Bore]

The only thing I see about that is sometimes the best ES and SD is not the best load for long range. Plus I need to know the average velocity for my click chart. Matt

So a less consistent load is somehow better, the farther it goes?

As for click charts, nothing beats actual rounds down range.

I guess I'm just from a different school...

 

[dkhunt14]

So a less consistent load is somehow better, the farther it goes?

As for click charts, nothing beats actual rounds down range.

I guess I'm just from a different school...

Not what I was trying to say. Low numbers isn't always the best. I had a Dasher that would shoot ES of 3 and groups at 100 in the low 1's consistently. The gun would not shoot under 13 inches of vertical at 1000. Another load with bigger numbers like 10 or more ES shot 4 to 5 inches at 1000. This was not the only gun that I had or saw do this. Sometimes you just need to test at distance and not rely on the chronograph or short range groups.

Yes you need to verify your click charts, but I need to know how many clicks to put on to get me close so I can see the impacts. I usually shoot at 1000 then go to 1300 and to 1700 to verify them. That way I have 3 different points to make my chart work or tweak it. Matt

 

[Cold Bore]

"Sometimes you just need to test at distance and not rely on the chronograph or short range groups."

I knew we could agree on something.

 

[ranger3]

Ruger Precision .243 with 26" barrel 1:7.7 twist.
I am using Winchester brass, 105 Berger Hybrids seated to mag length which gives me a .030 jump. Used 44.3gr. of H4831SC with Wolf primer and found that over the Magneto Speed and only got a five round average of 2829 fps. The Berger book shows I should be at those speeds with 43.8 gr. of H4831SC with a 24" barrel.
Doesn't this seem too slow for a 26" barrel?
What have others seen when loading for the 105 Hybrid?
Thanks for taking the time to look.

David

David

I would try IMR or H 4350 or Rl 22 to see if you can get more velocity. H100 should get you more velocity but is temp sensitive.
Alton

 

[hunter243sgk]

I have had good luck with hybrid 100 and better velocity. Running 80g to 107g pills.I don't hear of hardly anybody else using it for the 243 but I really like it.

 

[DaveMarine1]

Thanks for all of the insight and ideas guys. I guess the only way to go is to try some different powders and see what happens and pay attention to the pressures. Thanks again for all the help and your time!

David

 

[370bc]

I have had good luck with hybrid 100 and better velocity. Running 80g to 107g pills.I don't hear of hardly anybody else using it for the 243 but I really like it.

Im running H-100v in my 243 win w/ Berger 88's. Very steady, greta velocity. (3200 fps out of Douglas 24 inch, 1-12 barrel).

 

[Zero333]

In my notes I got....

.243 Shilen 26", Savage 11 action, MDT HS3.
-2 Celsius (28 f), 30km (20mph) wind, up to 50km (30mph) gusts.

105 Hornady BTHP, Lapua brass, 210M, 2.745"coal /2.255" to ogive (kissing lands), H-4831.

43.5gr 10shot average 2,932 fps
44gr 10 shot average 2,953 fps

Best accuracy was 42.5gr @ 2,861 fps avg.

Try 210M primers.

 

[Eric Leonard]

if I didnt want the extra speed I would have chambered it for a 6BR,,I shoot some unknown distance and 350-400 extra FPS makes that a lot easier,,

 

[TAJ45]

To clarify my last post, I'd like to see a chrono that only provided ES and SD numbers, comparing shots against others in the string, but not provide actual FPS.

Use it to develop a consistent load, but not worry if your load is slower or faster than your buddies.

........... I agree with this last sentence............

The only problem here is when the load is increased incrementally, looking for another node, there would be less feedback on "too hot, approaching danger, if not there already" when the velocity plateaus or drops. IIRC I've read where there was a definite drop but still no "other signs of pressure". AMMV (all mileages may vary)