284 win loads
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284 win loads
Hi Guys,
I have been playing with 175gn Sierra MK's in my straigh .284win.
Have a reached a load of 55.5gn AR2213sc that is not showing any significant pressure sighns. Accuracy is not that great so I am going to try a couple of other projectiles this week.
The first projectile that I want to try is the 171gn Barnes Match Burner and the second is the 180 gn Berger Hybrid.
Using AR2213sc, can anyone give me an indication on where I want to be with regard to powder charge for these two projectiles.
Thanks, Norm.
I have been playing with 175gn Sierra MK's in my straigh .284win.
Have a reached a load of 55.5gn AR2213sc that is not showing any significant pressure sighns. Accuracy is not that great so I am going to try a couple of other projectiles this week.
The first projectile that I want to try is the 171gn Barnes Match Burner and the second is the 180 gn Berger Hybrid.
Using AR2213sc, can anyone give me an indication on where I want to be with regard to powder charge for these two projectiles.
Thanks, Norm.
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norm,
with the berger, try 53 to 55 gn 2213sc.
i would look for the seating depth which is most accurate at 53 gn, before doing a ladder test in 0.3 gn increments.
the berger hybrid might shoot best jumped or jammed.
you can probably go over 55 gn, but case life will shorten.
there could also be a node between 50 and 53 gn of 2209, but 53 gn is getting up there.
don't rule out re 17 if you need more speed.
all cautions apply.
keep safe,
bruce.
with the berger, try 53 to 55 gn 2213sc.
i would look for the seating depth which is most accurate at 53 gn, before doing a ladder test in 0.3 gn increments.
the berger hybrid might shoot best jumped or jammed.
you can probably go over 55 gn, but case life will shorten.
there could also be a node between 50 and 53 gn of 2209, but 53 gn is getting up there.
don't rule out re 17 if you need more speed.
all cautions apply.
keep safe,
bruce.
"SUCH IS LIFE" Edward Kelly 11 nov 1880
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Hi Norm.
I am using 55.3gns 2213sc (TrueFlite 32in/Barnard) in my .284 with no pressure signs & consistent 0.5 MoA with 180gn SMK & 0.3 MoA with 168gn Berger VLD.
I have however had a few problems with the SMK not making the 1,000 yd line which is why I have now switched to the VLD. Both are set at .020 jump to lands measured with a Sinclair gadget.
I also have 180 Berger VLD's & will test them a bit further down the track when the weather improves.
Several of the guys are using the 162 AMax's with very good results and These are also on my list as the VLD's are expensive
I am using 55.3gns 2213sc (TrueFlite 32in/Barnard) in my .284 with no pressure signs & consistent 0.5 MoA with 180gn SMK & 0.3 MoA with 168gn Berger VLD.
I have however had a few problems with the SMK not making the 1,000 yd line which is why I have now switched to the VLD. Both are set at .020 jump to lands measured with a Sinclair gadget.
I also have 180 Berger VLD's & will test them a bit further down the track when the weather improves.
Several of the guys are using the 162 AMax's with very good results and These are also on my list as the VLD's are expensive
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I use a very mild load of 51grs of 2209 behind 168gr sierras or bergers.This load has grouped at 5 inches at 1000yards and run up some very good scores on the old and new f open targets.
I have found 2209 better with the 175's on the few occasions i tried them. I found the 168gr sierra superior in uniformity then the 175 and stayed with them.
cheers
I have found 2209 better with the 175's on the few occasions i tried them. I found the 168gr sierra superior in uniformity then the 175 and stayed with them.
cheers
don't let the bastards grind you down
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Over the last couple of days I have tried the 171gn Barnes with AR2213sc.
Loads used varied from 55gn to 59gn. CCI BR-2 primer, Lapua 6.5-284 cases.
Found plenty of accuracy and a node between 55gn and 57gn. Seared 0.015" into the lands. Didn't seem to matter what powder charge I used as they were all quite accurate.
Settled on 56.5gn and will give it a run next time I get a chance at the club match.
Loads used varied from 55gn to 59gn. CCI BR-2 primer, Lapua 6.5-284 cases.
Found plenty of accuracy and a node between 55gn and 57gn. Seared 0.015" into the lands. Didn't seem to matter what powder charge I used as they were all quite accurate.
Settled on 56.5gn and will give it a run next time I get a chance at the club match.
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Hi Guys,
I load tested 52.9 - 55.3g of AR2213SC and 180g Hybrids this morning, in .3g increments. 5 shot groups. Lapua cases. Fed GM primers.
52.9 was the tightest and there was no elevation change through 53.2 and 53.5g though some vertical flyers were introduced. After that the elevation gradually started to climb and groups opened significantly. I didn't find another node.
I'm thinhking I'm going to confirm 53g is good and work the seating depth on that load.
I see Bruce recommended trying 53-55g.
I haven't chronied the load yet, but does 53g sound like it might be a bit light for a competetive 500 - 800y F-class load? or is it ok to be at the bottom end of that recommendation?
Cheers, Denis.
I load tested 52.9 - 55.3g of AR2213SC and 180g Hybrids this morning, in .3g increments. 5 shot groups. Lapua cases. Fed GM primers.
52.9 was the tightest and there was no elevation change through 53.2 and 53.5g though some vertical flyers were introduced. After that the elevation gradually started to climb and groups opened significantly. I didn't find another node.
I'm thinhking I'm going to confirm 53g is good and work the seating depth on that load.
I see Bruce recommended trying 53-55g.
I haven't chronied the load yet, but does 53g sound like it might be a bit light for a competetive 500 - 800y F-class load? or is it ok to be at the bottom end of that recommendation?
Cheers, Denis.
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denis,
a new barrel has told me that previous theory was bordering on schidt.
a ladder test in the zone of 53 - 55 gn 2213sc revealed no serious node and lower vels than previous barrels.
a repeat of the above ladder, but continuing to 57 gn revealed a sort of node at 54.6 gn (2758) and a good node at 56 gn (2815).
there could be one higher than 57, but i would prefer not to go there unless necessary. this with180 hybrid jammed 0.015.
180 vld jammed 0.015 gave a node at 54.6 (2733) and at 56 gn (2795).
i am happy to shoot these bullets at 2700 if accurate.
as usual, 2209 gave a node between 50.0 and 53.0 of 2209.
in this case 51.0 to 180 vld (2798) jammed 0.015.
just goes to show you have to let the barrel do the talking.
a friend has a node in a 284 at about 2900 with good case life!
it always pays to do a bullet relationship to lands shooting test prior to a ladder for max value.
frustrating, but satisfying at the end.
keep safe,
bruce.
a new barrel has told me that previous theory was bordering on schidt.
a ladder test in the zone of 53 - 55 gn 2213sc revealed no serious node and lower vels than previous barrels.
a repeat of the above ladder, but continuing to 57 gn revealed a sort of node at 54.6 gn (2758) and a good node at 56 gn (2815).
there could be one higher than 57, but i would prefer not to go there unless necessary. this with180 hybrid jammed 0.015.
180 vld jammed 0.015 gave a node at 54.6 (2733) and at 56 gn (2795).
i am happy to shoot these bullets at 2700 if accurate.
as usual, 2209 gave a node between 50.0 and 53.0 of 2209.
in this case 51.0 to 180 vld (2798) jammed 0.015.
just goes to show you have to let the barrel do the talking.
a friend has a node in a 284 at about 2900 with good case life!
it always pays to do a bullet relationship to lands shooting test prior to a ladder for max value.
frustrating, but satisfying at the end.
keep safe,
bruce.
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- Joined: Wed Nov 09, 2011 7:00 pm
- Location: Sunshine Coast, QLD
Thanks Bruce. I'll take your advice. I'll try seating depth at 53g (since I know thats a tight load) and then incremented 55g to 57g charges.
I'll chrony the 53g load so I know where I'm at.
I really want to run MV at around 2800fps if thats not going to be too harsh on cases or the throat.
There were no pressures signs at all out to 55.3g.
I would guess 57 is getting close to filling the case?
Thanks for your advice.
I'll chrony the 53g load so I know where I'm at.
I really want to run MV at around 2800fps if thats not going to be too harsh on cases or the throat.
There were no pressures signs at all out to 55.3g.
I would guess 57 is getting close to filling the case?
Thanks for your advice.
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Denis,
In my experience, the limiting factor with the Lapua 6.5-284 case expanded to 7mm is the case head - loose primers will be the first casualty if your pressure gets too high. Try your 57gn loads then see how easily the next primers go in.
I agree 100% with Bruce's comments "let your barrel do the talking". And if you can't find a good node with the hybrids, try the VLDs, or drop down to 168s. Accuracy is way more important than velocity. All the 7mm VLDs and hybrid have ample BC even at moderate velocity to perform very well in the wind.
I made the mistake of restricting a barrel to 180s until it had done about 1000 rounds (without much success), then I thought, nothing to lose, may as well try the 168s and use it at the shorts - the result was the most accurate rifle I've had - it holds the 6 ring all day and every day from the shorts out to the longs.
Another thing that I tend to harp on - don't put too much faith in 5 shot groups. Anyone with a knowledge of basic statistics will agree with me. You can safely eliminate loads with bad 5 shot groups, but you shouldn't lock yourself in to a load with a good (or even great) 5 shot group. You should leave the jury out until its done a couple of 10 shot matches.
Enjoy your 7mm.
Alan
In my experience, the limiting factor with the Lapua 6.5-284 case expanded to 7mm is the case head - loose primers will be the first casualty if your pressure gets too high. Try your 57gn loads then see how easily the next primers go in.
I agree 100% with Bruce's comments "let your barrel do the talking". And if you can't find a good node with the hybrids, try the VLDs, or drop down to 168s. Accuracy is way more important than velocity. All the 7mm VLDs and hybrid have ample BC even at moderate velocity to perform very well in the wind.
I made the mistake of restricting a barrel to 180s until it had done about 1000 rounds (without much success), then I thought, nothing to lose, may as well try the 168s and use it at the shorts - the result was the most accurate rifle I've had - it holds the 6 ring all day and every day from the shorts out to the longs.
Another thing that I tend to harp on - don't put too much faith in 5 shot groups. Anyone with a knowledge of basic statistics will agree with me. You can safely eliminate loads with bad 5 shot groups, but you shouldn't lock yourself in to a load with a good (or even great) 5 shot group. You should leave the jury out until its done a couple of 10 shot matches.
Enjoy your 7mm.
Alan
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further to what alan says re pressure, my top 2 loads of 2209 had clicking when i lifted the bolt.
the load was safe, but extraction was becoming a bit tight. don't go there.
i have had loose primers in all calibres from 17 to 22, up to 9.3 and 375.
brass can only take so much.
alan, what powder do you use with 168s?
keep safe,
bruce.
the load was safe, but extraction was becoming a bit tight. don't go there.
i have had loose primers in all calibres from 17 to 22, up to 9.3 and 375.
brass can only take so much.
alan, what powder do you use with 168s?
keep safe,
bruce.
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