800X Chrono Data with 135 Noslers and 180 FP Berrys [Archive] - Glock Talk

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Whaledriver
05-17-2010, 10:37
Okay finally got out to try out the new Chrono (Pro Chrono) and to get some 10mm data. Here were the conditions:

Ovecast
Temp 61 F
Pressure 29.99
Altitude 1020'

Load data:

Starline Brass
CCI 350 Primers
Powder
IMR 800x
Also used a light crimp with Lee FCD

Pistol is a stock G20sf.

Okay first data is with Berry's 180 grain FP. I had worked up the load to a max published of 8.7. Here is my 8 shot string:

1135
1135
1104
1203
1131
1108
1115
1128

Not sure what happened with the 1203. No pressure signs, no glock smiles. Otherwise accuracy seemed really good. Recoil was snappy but easily controllable.

Next string is with the 135 grain Noslers with 12.0 charge:

1510
1515
1522
1538
1501

Fairly light recoil, no pressure signs, very accurate.

Next is 135 Nosler with 12.5 charge:

1556
1561
1561
1576
1580

These had snappy recoil and flattened primers. No glock smiles.

Same above with 12.6:

1610
1633
1675
1677
1647

Snappy recoil, flattened primers, no glock smiles

Finally went to 12.7:

1705

Glock smile showed and I was done. Flattened primer. Did not want to test anymore. I am gonna go back to 12.0 as it seems fast enough for me and will not tear up my brass.

Some notes on the chrono. I do like the ProChono only one error the whole time I shot. I will need to get the cord to hook up my laptop as being on a controlled range does not let you select the things you need in a timely manner.

Taterhead
05-17-2010, 21:15
Thanks for the data. Interesting results - especially for the 135 gr Nosler.

For the 180, it looks like you may have been straddling sub and supersonic velocities. Did you notice a "crack" with some loads and not others? I always find that weird.

In my G20, I have run 800-X up to 14.5 grains based upon some old IMR data. Although that was with standard primers. I am getting 1690 fps ave velocity with 14.3 grains. That is not substantially higher than your data for 12.6 grain loads. Diminishing returns are obviously in play.

In my experience, 800-X and mag primers cause flattened primers at charge levels lower than expected. Some people swear by mag primers for 800-X, but CCI 300s have worked better for me, in terms of pressure indications, at comparable velocities. Of course velocity spreads are tighter with the 350 primer.

For the sake of gaining additional data points, I have loaded 135 gr Noslers over 11.0, 11.5, and 12.0 grains of 800-X. I've shot them at these charges before, but never over a chrony. I'm going to test them this Saturday after the IDPA match. I'll post my notes.

Curious, do you have any photos of your primers for the 12.6 or 12.7 loads?

Whaledriver
05-17-2010, 21:39
Tater,

Never heard that about the 180s. I seem to learn something new all the time. I will try to get the pics of the primers for ya in the next couple of days. So you ran it up to 14.3 with a stock barrel?

Taterhead
05-18-2010, 21:57
What I meant by the 180s and super/subsonic was that you had velocity measurements slightly above and below supersonic speeds. Supersonic velocities are 1125 fps +/- and you were right around those velocities. I always find it weird when you send rounds from a string that sometimes register that audible crack from the supersonic soundwave. Did you notice that at all?

Thanks in advance for posting the pics.

I actually tested all the way to the published max of 14.5. Yes with the stock barrel. But as I mentioned earlier, that was with a standard primer. Coincidentally, the average velocities for 14.3 and 14.5 were identical. I still have a bunch of them loaded up at 14.3 grains. I may shoot them in an IDPA match one of these days just for fun. Won't help my times any, but it'll get some attention.

Waffentomas
05-19-2010, 11:17
I have actually, regularly, had lower velocities using 350 primers, vs. 300 primers, using 800x. It's the only powder I've ever had do this. It's usually only lower by 10 or 15 fps or so, but still...

Taterhead
05-20-2010, 18:10
That is interesting that velocities are lower in your measurements. Mine have been slightly higher at similar charge weights, but with indications of higher pressures at a given velocity levels.

Curious about the type of firearm you are using. Are you velocity spreads tighter with the 350?

Waffentomas
05-26-2010, 20:05
The last time I tested I was using my old Colt Delta. It's pretty much stock. Deviations have always been higher using the 350s with this powder. Since it can be a finicky powder for good metering, I still use the Lee dippers for this powder; and this may be why...

Tom

preventec47
06-08-2010, 02:59
Just a thought here since the Nosler 135 grainers are being used.

Since it has been shown that they explode
and fragment badly at the hi velocities,
Sierra also has a 135gr Jacketed Hollow
Point bullet which could be a little tougher
than the Nosler. Dont know until someone
tests them side by side.

Also Berrys makes a plated solid bullet
in 135gr but there seems to be widespread
agreement that the copper plating does
not do so well at ultra hi velocities.

Whaledriver
06-12-2010, 10:34
Also interested in some tests with the Nosler 180 grain HPs. Wonder if they have a tendency to frag like the 135s do.

preventec47
06-12-2010, 17:20
I discovered that MagTech sells a 130gr all copper hollow point
bullet which they also load in their 40SW ammo at a claimed
velocity of 1190fps if my memory serves correctly.

Judging from my experience with Barnes Bullets the all copper
bullet has the potential to be very tough and avoid
total fragmentation.

I have sent inquiries regarding whether they have tested their
all copper bullet at higher 10mm velocities. I also asked
what the specific length of the bullet was for the purpose
of calculating remaining case space.

If I get a response I will forward to this group.

ctkelly
06-12-2010, 18:02
Also interested in some tests with the Nosler 180 grain HPs. Wonder if they have a tendency to frag like the 135s do.

I've done some testing with the nosler using AA #7. Using 11 grains, CCI 350 primer, Top Brass, OAL of 1.260 the bullet went ~1160 five shot average from my G29 with KKM barrel. Nosler sent reloading data and specified 11 was the max, a WLP primer, Winchester case, and produced a meager 1190 from a 6" Springfield Omega...

In talking with a small ammo manufacturer he reported the 180 noslers had jacket separation in air when ever driven over the 1400 FPS mark. I think nosler designed the bullet to be driven in the lower 10mm/high 40 S&W velocities. Works good for my G29 though.

Whaledriver
06-15-2010, 21:48
I've done some testing with the nosler using AA #7. Using 11 grains, CCI 350 primer, Top Brass, OAL of 1.260 the bullet went ~1160 five shot average from my G29 with KKM barrel. Nosler sent reloading data and specified 11 was the max, a WLP primer, Winchester case, and produced a meager 1190 from a 6" Springfield Omega...

In talking with a small ammo manufacturer he reported the 180 noslers had jacket separation in air when ever driven over the 1400 FPS mark. I think nosler designed the bullet to be driven in the lower 10mm/high 40 S&W velocities. Works good for my G29 though.

Good info on the 180s. That seems to be the constant that most 40/10mm are geared to the more popular 40 cal ballistics for obvious reasons. If someone would come out with a 10mm line of boolits for the 10 crowd I think they would have a winner. Something that would be optimal at the 1300 fps range for the 180s or 1200 for the 200 grainer.