I loaded up some 9mm on my new sdb. I used 4.4 gr bullseye under a 115 canpro fmjrn.According to my Speer book it says not to load under the col for the bullet you are using.The sdb comes already adjusted so i cranked out some. I measured the col and they measured 1.103". The manual says they should be 1.135'' which means mine are .032 too short. My question- are they safe to shoot or should i pull them, i made 135 that length.
safe to shoot?
- Thread starter ronaldharold
- Start date
Seating deeper raises chamber pressure.
Quickload data below 4.4 grains bullseye 115 grain bullet, max rated chamber pressure 35,000 psi
1.103 32559 psi (Quickload guestimate shows pressure under max of 35000 psi, +P loads are 38500 psi)
1.135 28233 psi (seating longer drops pressure 4,326 psi)
How to determine Max OAL for a CZ Pistol
(this applies to all pistols, competitive shooters like seating their bullets long)
http://www.czfirearms.us/index.php?topic=34225.msg189131#msg189131
Cartridge : 9 mm Luger (SAAMI)
Bullet : .355, 115, Speer TMJ 3995
Useable Case Capaci: 7.633 grain H2O = 0.496 cm³
Cartridge O.A.L. L6: 1.103 inch = 28.02 mm
Barrel Length : 4.0 inch = 101.6 mm
Powder : Alliant BULLSEYE
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-20.0 75 3.52 978 244 20286 3746 92.0 0.520
-18.0 77 3.61 999 255 21339 3859 92.8 0.507
-16.0 79 3.69 1019 265 22430 3972 93.6 0.495
-14.0 81 3.78 1039 275 23559 4081 94.3 0.484
-12.0 83 3.87 1058 286 24727 4190 95.0 0.473
-10.0 85 3.96 1078 297 25935 4297 95.6 0.462
-08.0 87 4.05 1098 308 27184 4401 96.2 0.452
-06.0 89 4.13 1117 319 28476 4503 96.7 0.442
-04.0 90 4.22 1136 330 29811 4603 97.2 0.433 ! Near Maximum !
-02.0 92 4.31 1155 341 31191 4700 97.7 0.424 ! Near Maximum !
+00.0 94 4.40 1174 352 32617 4795 98.1 0.415 ! Near Maximum ! (4.4 bullseys = 32617 psi at 1174 fps)
+02.0 96 4.49 1193 363 34090 4888 98.5 0.406 ! Near Maximum !
+04.0 98 4.57 1212 375 35612 4977 98.8 0.398 !DANGEROUS LOAD-DO NOT USE!
+06.0 100 4.66 1230 386 37184 5063 99.1 0.391 !DANGEROUS LOAD-DO NOT USE!
+08.0 102 4.75 1248 398 38808 5147 99.3 0.383 !DANGEROUS LOAD-DO NOT USE!
+10.0 104 4.84 1267 410 40485 5228 99.5 0.376 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 94 4.40 1218 379 37396 4748 100.0 0.391 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 94 4.40 1117 319 27894 4665 93.1 0.445
Quickload data below 4.4 grains bullseye 115 grain bullet, max rated chamber pressure 35,000 psi
1.103 32559 psi (Quickload guestimate shows pressure under max of 35000 psi, +P loads are 38500 psi)
1.135 28233 psi (seating longer drops pressure 4,326 psi)
How to determine Max OAL for a CZ Pistol
(this applies to all pistols, competitive shooters like seating their bullets long)
http://www.czfirearms.us/index.php?topic=34225.msg189131#msg189131
Cartridge : 9 mm Luger (SAAMI)
Bullet : .355, 115, Speer TMJ 3995
Useable Case Capaci: 7.633 grain H2O = 0.496 cm³
Cartridge O.A.L. L6: 1.103 inch = 28.02 mm
Barrel Length : 4.0 inch = 101.6 mm
Powder : Alliant BULLSEYE
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-20.0 75 3.52 978 244 20286 3746 92.0 0.520
-18.0 77 3.61 999 255 21339 3859 92.8 0.507
-16.0 79 3.69 1019 265 22430 3972 93.6 0.495
-14.0 81 3.78 1039 275 23559 4081 94.3 0.484
-12.0 83 3.87 1058 286 24727 4190 95.0 0.473
-10.0 85 3.96 1078 297 25935 4297 95.6 0.462
-08.0 87 4.05 1098 308 27184 4401 96.2 0.452
-06.0 89 4.13 1117 319 28476 4503 96.7 0.442
-04.0 90 4.22 1136 330 29811 4603 97.2 0.433 ! Near Maximum !
-02.0 92 4.31 1155 341 31191 4700 97.7 0.424 ! Near Maximum !
+00.0 94 4.40 1174 352 32617 4795 98.1 0.415 ! Near Maximum ! (4.4 bullseys = 32617 psi at 1174 fps)
+02.0 96 4.49 1193 363 34090 4888 98.5 0.406 ! Near Maximum !
+04.0 98 4.57 1212 375 35612 4977 98.8 0.398 !DANGEROUS LOAD-DO NOT USE!
+06.0 100 4.66 1230 386 37184 5063 99.1 0.391 !DANGEROUS LOAD-DO NOT USE!
+08.0 102 4.75 1248 398 38808 5147 99.3 0.383 !DANGEROUS LOAD-DO NOT USE!
+10.0 104 4.84 1267 410 40485 5228 99.5 0.376 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 94 4.40 1218 379 37396 4748 100.0 0.391 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 94 4.40 1117 319 27894 4665 93.1 0.445
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- Over the rainbow
If I'm reading that right, QuickLoad's data says OP is .17 gn away from a dangerous charge that exceeds his rated chamber pressure with his stated OAL.
ronaldharold, how confident are you that you measured your powder precisely? How many rounds did you load?
I'm also a noob, and am personally sticking with load recipes from my manuals exactly until I have a bit more experience under my belt.
If it's a smallish number of rounds you loaded, or if you're not confident with the accuracy of your powder, I personally would pull them for peace of mind.
My maxim for the first year or so I'm going to be reloading is 'when in doubt, throw it out'. I'm nervous enough pulling the trigger on my own hand loads.. I don't need that uncertainty rattling around in the back of my head.
Bigedp51, what would you do?
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I don't think that Speer used Cam-Pro bullets to develop their data. The book OAL is only relevant for the exact bullet used to develop the data, as almost every brand is slightly different in shape.
What you need to do is work out the correct OAL to fit your gun with the bullet you're using and work up a load based on the charge range from the manual.
What you need to do is work out the correct OAL to fit your gun with the bullet you're using and work up a load based on the charge range from the manual.
I wound up putting rounds in bullet puller and tapping it lightly enough to draw the bullets out without the bullet and powder coming off of the brass, then I put them back through station 3 and 4 to seat them and crimp so the col is between 1.125 and 1.130. I went to the range and tried them today and they all worked 100%.
I have a number of 9mm pistols and find that an OAL of about 1.120" works well in all of them.
Bullseye is a wonderful powder for making accurate ammo, but not usually used for making real hot ammo because it is very fast and a slight powder charge variation can get exciting.
Was there a reason why you were loading to the max? Best accuracy is seldom found at that level. I would use Bullseye for loads in the 3.5 to 4.0 gr range.
For max power, Power Pistol is easier to work with.
Bullseye is a wonderful powder for making accurate ammo, but not usually used for making real hot ammo because it is very fast and a slight powder charge variation can get exciting.
Was there a reason why you were loading to the max? Best accuracy is seldom found at that level. I would use Bullseye for loads in the 3.5 to 4.0 gr range.
For max power, Power Pistol is easier to work with.
No loading kit comes pre-adjusted for OAL or anything else. However. 4.4 of Bullseye is a safe load. 1.135" is a bit long(Alliant says 1.125" with a 115), but the OAL will vary somewhat by bullet shape. If the loaded cartridge fits in the mag and feeds, it'll do. 9mm's aren't target guns.
