Chronographed some reloads

[jonathanglock]

Chronographed some reloads, yesterday. I was expecting closer velocities. Am I being too picky?

Here's the results: out of a Lone Wolf (4.5")40-9 conversion barrel in my Glock 22

Did some factory Remington UMC 115 gr. FMJ first
1061fps,1112,1059,1069,1076,1080,1077,1084,1042,1024,1088,1048,1068,1028,1062,1096,1073,1068,1076,1082

then my reloads(I'm pretty new to reloading, only a few months)

9mm fmj 115gr bullet, 1.142 OAL, found a big jug of IMR SR4756 in PA a few months back when it was hard to find anything.

5.8 grains 4756
1073,1028,1047,1040,1127,1037,1057,1109,1146,1129,1111,1085,1103,1078,1063,1035,1036,1095,1044,1035,1006,1048

6.2
1176,1135,1093,1119,1128,1122,1131,1145,1138

6.3
1143,1122,1139,1153,1187,1200,1160,1244,1174,1133,1134,1139,1125,1142,1175,1183,1159,1154

and then some 357 sig 125 grain lead flat nose, out of a 6" lone wolf 357sig barrel (I originally bought it to try to see if I could hunt deer with it)

7.9 grains 4756 1.14 OAL
1353,1388,1392,1372,1424,1352,1382,1385,1380

8.3 grains 4756
1456,1467,1475,1458,1472

8.6
1505,1529,1505,1519,1533

8.9
1555,1552,1572,1558,1524

I was happy with the velocity of the 357sig, maybe just a little faster so I could theoretically hunt deer with it. No signs of overpressurization on any of the brass. Are the 9mm velocities typical, or should I expect the velocities to be closer together?

 

[jimbobborg]

What are you using for a powder measure?

 

[Magnumite]

The 8.3 and 8.6 grain loads in 357 Sig looks good, though one string isn't highly reliable data. In this case you have two charges with similar statistics, that is probably your sweet spot. In pistol, as in all ammo, you want to see low SD's. This will typically be accompanied by a low extreme spread as well. You can get low SD's and extreme spreads in low and high pressure rounds. This speaks toward the efficiency of the round. A load can be a little 'looser' statistically but still be very accurate at handgun ranges.

In high pressure magnum handgun (as the Sig 357 and 9mm) rounds I have loads with single digit SD's and extreme spreads in the teens or 20's. The smaller case capacity of the 9 will make it more sensitive to large deviation in thrown charge weights, as alluded to an earlier post.

Watch the behavior of your shot strings. If the velocities tend to increase or decrease through a string then you pistol may be setting back the bullet on feeding, dependent of feedramp, mag relationships and so on. Example, I noticed some of my typically very good 44 Mag rounds with loosened stats once. I noticed the shot velocities decreasing through the string, especially rounds 5 and 6. I fired the next cylinder, opening the cylinder and pulling/inspecting the next round to be fired. The bullets were being inertia pulled from the cases. The last round on two cylinders the cannuler was in front of the case mouth. The next cylinder I single loaded each round and the performance/stats were back. I didn't fret much about it because

1.) it was old, work hardened brass;
2.) the Lee FCD doesn't crimp as tightly as many other crimp dies. This is by design and not a fault with the Lee FCD.

I reinstalled/adjusted the RCBS crimp die, ran another batch, included some once fired same brand brass. Most of the bullet creep was gone on the old brass and nonexistent on the once fired brass.

 

[jonathanglock]

What are you using for a powder measure?

I'm using those little yellow dippers that come with Lee dies, and then weighing each charge on my digital scale. It's the most tedious, time consuming part of the whole process. Maybe one day I'll get something better.

What are you guys using for powder? It seems like a lot of you like Titegroup or Unique.

Thanks for all the information

 

[Magnumite]

I am just cutting my teeth on 9mm and have only used one Bullseye powder in it. It shoots pmay for steel shooting. I have an M&P 9 so the platform isn't great for evaluating load accuracy, so the jury is still out.

No experience with 357 Sig.

Most of my handgun shooting is Bullseye or Unique on the light to midrange end of the velocity scale and H110, 2400 and Blue Dot on the heavy load end. All arevery consistant. Blue Dot can get a little if you try to drive it too hard

 

[covertpanda]

Chronographed some reloads, yesterday. I was expecting closer velocities. Am I being too picky?

Here's the results: out of a Lone Wolf (4.5")40-9 conversion barrel in my Glock 22

Did some factory Remington UMC 115 gr. FMJ first
1061fps,1112,1059,1069,1076,1080,1077,1084,1042,1024,1088,1048,1068,1028,1062,1096,1073,1068,1076,1082

then my reloads(I'm pretty new to reloading, only a few months)

9mm fmj 115gr bullet, 1.142 OAL, found a big jug of IMR SR4756 in PA a few months back when it was hard to find anything.

5.8 grains 4756
1073,1028,1047,1040,1127,1037,1057,1109,1146,1129,1111,1085,1103,1078,1063,1035,1036,1095,1044,1035,1006,1048

6.2
1176,1135,1093,1119,1128,1122,1131,1145,1138

6.3
1143,1122,1139,1153,1187,1200,1160,1244,1174,1133,1134,1139,1125,1142,1175,1183,1159,1154

and then some 357 sig 125 grain lead flat nose, out of a 6" lone wolf 357sig barrel (I originally bought it to try to see if I could hunt deer with it)

7.9 grains 4756 1.14 OAL
1353,1388,1392,1372,1424,1352,1382,1385,1380

8.3 grains 4756
1456,1467,1475,1458,1472

8.6
1505,1529,1505,1519,1533

8.9
1555,1552,1572,1558,1524

I was happy with the velocity of the 357sig, maybe just a little faster so I could theoretically hunt deer with it. No signs of overpressurization on any of the brass. Are the 9mm velocities typical, or should I expect the velocities to be closer together?

Hey the range on the 9mm is a little big. For my .40major load the range is around 16 with an SD of 5. Also, I would agree that you probably need more data points.