HELP! to much pressure

25 December 2016, 06:50

i can not figure out why I'm getting to much pressure reloading .223 ,blowing out primers cases getting stuck busted extraction claw. started with below min charge. once shot lake city brass,sized to book spec.not taking out to much at primer pocket primers go in good neck tension is at .neck size is .247, I've tried the redding dies with the bushing .245,.246.,.247 can't get pass 22.5 IMR 4064, min @ H335 ,BLC-2, What is going on I've got other rounds loaded (600plus)of 223 ,75gr,68,69,75.shooting a win HV I've got pictures

25 December 2016, 07:21

buckey

Check your powder scale for accuracy! Then double check everything your doing.

25 December 2016, 07:28

scoutsout

i went to my local pharmacy had some items weight ,scales are good digital too is cal

25 December 2016, 07:30

scoutsout

duh! how do you put pics on this forum

25 December 2016, 07:54

dpcd

Open a photo bucket account, free, and put your pictures there. Then click on the bottom link (there will be 4) and copy them. Paste them here on AR. It is simpler than my explanation.

25 December 2016, 09:40

Fjold

Are your bullets seated into the lands?

25 December 2016, 10:00

Lamar

all of the minimum loads showing pressure is an indication your rifle is the issue not the ammo.

25 December 2016, 12:09

p dog shooter

quote:
Originally posted by Lamar:
all of the minimum loads showing pressure is an indication your rifle is the issue not the ammo.

How does it behave with factory ammo?

25 December 2016, 19:37

Rapidrob

There are many factors that can cause problems
Powder scale is FUBAR or way out of calibration. Who's scale are you using?
What load are you using?
How far up the case is the charge?
What primer?
Who's bullet?
Bullet weight?
Rifling twist? ( if 1:7 and you are using 1:12 or 1:9 loads you can get into trouble)
Over all length of loaded cartridge"
Who barrel?
What chamber?
Bullet diameter for REAL-measure it,don't rely on what the box says.
How long are your cases?

25 December 2016, 20:20

243winxb

If factory ammo gives problems, make a chamber cast with cerrosafe

25 December 2016, 21:12

jpl

quote:
Originally posted by dpcd:
Open a photo bucket account...

Please no. Just no, they are so terrible. Try postimg.org or about 50 others.

RE your pressure, what speeds are you getting? If you have a tight bore then you might see pressure with lower charge weights. If speeds are where you want them then stick with low charges. If not, you can try some slower powder.

Is the bore clean? If it has some severe fouling that could be a factor.

25 December 2016, 21:35

OLBIKER

If you are using a magnum primer change to non magnum.I have seen where guys use magnum primers because they are harder and blow off their extractors.CCI makes primers for AR`s.

26 December 2016, 01:40

Nakihunter

Check the bullets. Are you using the right ones or are you using heavier ones by mistake.

Check case length. Are they trimmed or too long? Lon cases will get pinched at the throat and result in pressure spike.

Have you fired safe reloads in that particular rifle before?

26 December 2016, 09:48

Saeed

We still do not know what rifle is being used.

I have had a BRNO 243 with a very tight bore, that did exactly as this one is doing.

That one had a .239 groove diameter instead of .243.

26 December 2016, 12:26

AFRICAN LEADWOOD

quote:
Originally posted by Saeed:
We still do not know what rifle is being used.

I have had a BRNO 243 with a very tight bore, that did exactly as this one is doing.

That one had a .239 groove diameter instead of .243.

Wow! Sorry to OP to highjack. Which era of Brno / CZ Saeed?

26 December 2016, 17:25

Saeed

This was sometimes in the 70's.

26 December 2016, 21:44

scoutsout

quote:
Originally posted by Fjold:
Are your bullets seated into the lands?

i used a Hornady OAL gauge , off the lands and grooves

26 December 2016, 22:04

scoutsout

quote:
Originally posted by 243winxb:
If factory ammo gives problems, make a chamber cast with cerrosafe

factory ammo no problem ,my other rounds i reloaded shoot great ,69,75,60 68,grains

26 December 2016, 22:09

scoutsout

quote:
Originally posted by dpcd:
Open a photo bucket account, free, and put your pictures there. Then click on the bottom link (there will be 4) and copy them. Paste them here on AR. It is simpler than my explanation.

thanks

26 December 2016, 22:11

scoutsout

quote:
Originally posted by Lamar:
all of the minimum loads showing pressure is an indication your rifle is the issue not the ammo.

if that is the case my AR is bad and my winchester HV both have bad chambers

26 December 2016, 22:23

scoutsout

quote:
Originally posted by Nakihunter:
Check the bullets. Are you using the right ones or are you using heavier ones by mistake.

Check case length. Are they trimmed or too long? Lon cases will get pinched at the throat and result in pressure spike.

Have you fired safe reloads in that particular rifle before?

case length is good (2.750) i just purchased a redding FL,bushing die ,s type got the .245,.246..247. it can not be neck tension

26 December 2016, 22:25

scoutsout

quote:
Originally posted by OLBIKER:
If you are using a magnum primer change to non magnum.I have seen where guys use magnum primers because they are harder and blow off their extractors.CCI makes primers for AR`s.

no mag primers CCI,BR primers, some winchester

26 December 2016, 22:45

scoutsout

quote:
Originally posted by Rapidrob:
There are many factors that can cause problems
Powder scale is FUBAR or way out of calibration. Who's scale are you using?
What load are you using?
How far up the case is the charge?
What primer?
Who's bullet?
Bullet weight?
Rifling twist? ( if 1:7 and you are using 1:12 or 1:9 loads you can get into trouble)
Over all length of loaded cartridge"
Who barrel?
What chamber?
Bullet diameter for REAL-measure it,don't rely on what the box says.
How long are your cases?

loads started @BLC-2,22.5 good ,22.7 blew primer,H335 started @22.2@22.4
blew blew primer , IMR 4064 stared @22.0blew out@22.4 max 24.0 using Hornady 9th ed GOT 50th ed too and lyman 50th

26 December 2016, 23:17

Bobster

quote:
Originally posted by scoutsout:
i can not figure out why I'm getting to much pressure reloading .223 ,blowing out primers cases getting stuck busted extraction claw. started with below min charge. once shot lake city brass,sized to book spec.not taking out to much at primer pocket primers go in good neck tension is at .neck size is .247, I've tried the redding dies with the bushing .245,.246.,.247 can't get pass 22.5 IMR 4064, min @ H335 ,BLC-2, What is going on I've got other rounds loaded (600plus)of 223 ,75gr,68,69,75.shooting a win HV I've got pictures........loads started @BLC-2,22.5 good ,22.7 blew primer

OK, you say you are using Lake City military brass. Military brass can have up to ten percent less internal case volume than commercial. Starting loads in manuals are for commercial brass. You would need to lower your starting loads at least 10% below that. Little bitty cartridges like .222 and .223 are very sensitive to even a .1 grain variance.

26 December 2016, 23:38

scoutsout

quote:
Originally posted by Bobster:
quote:
Originally posted by scoutsout:
i can not figure out why I'm getting to much pressure reloading .223 ,blowing out primers cases getting stuck busted extraction claw. started with below min charge. once shot lake city brass,sized to book spec.not taking out to much at primer pocket primers go in good neck tension is at .neck size is .247, I've tried the redding dies with the bushing .245,.246.,.247 can't get pass 22.5 IMR 4064, min @ H335 ,BLC-2, What is going on I've got other rounds loaded (600plus)of 223 ,75gr,68,69,75.shooting a win HV I've got pictures........loads started @BLC-2,22.5 good ,22.7 blew primer

OK, you say you are using Lake City military brass. Military brass can have up to ten percent less internal case volume than commercial. Starting loads in manuals are for commercial brass. You would need to lower your starting loads at least 10% below that. Little bitty cartridges like .222 and .223 are very sensitive to even a .1 grain variance.

done that stared with H335@22.0did not get passed 22.4is it normal not to get passed 22.2grs blc-2 blew primer @22.7 with lake city brassRCBS pocket swagger hand held primer stop using auto primer,2thou of neck tension,no crimp,i need to get a crono to see what FPS i getting with those low powder loads , I'm going to try some VARGET and BENCHMARK

27 December 2016, 01:59

Bobster

With the heavy, long bearing surface bullets you say you are using the starting load should be closer to 20 grains with a guessed max around 22.5, using the LC brass. Yes, I'd get a chrono and see where you are at. Just because a manual lists start and max loads doesn't mean they are in stone for a given caliber. You have to do what is safe. I'm guessing you will find out you are achieving targeted velocities.

27 December 2016, 04:39

scoutsout

quote:
Originally posted by Bobster:
With the heavy, long bearing surface bullets you say you are using the starting load should be closer to 20 grains with a guessed max around 22.5, using the LC brass. Yes, I'd get a chrono and see where you are at. Just because a manual lists start and max loads doesn't mean they are in stone for a given caliber. You have to do what is safe. I'm guessing you will find out you are achieving targeted velocities.

well i came to a conclusion today ,after reloading and pulling bullets and reloading ,BLC-2 and H355 does not work good with lake city brass, after all that loaded up some rounds with some varget .for some reason i got up too 24.5gr no problem .i reckon h335and BLC-2 are not compatable with 68gr and 75gr bullets those other two powders i could not get passed 22.0gr with lake city brass.i will try blc and H335 with klighter bullets.

27 December 2016, 04:47

scoutsout

quote:
Originally posted by Bobster:
quote:
Originally posted by scoutsout:
i can not figure out why I'm getting to much pressure reloading .223 ,blowing out primers cases getting stuck busted extraction claw. started with below min charge. once shot lake city brass,sized to book spec.not taking out to much at primer pocket primers go in good neck tension is at .neck size is .247, I've tried the redding dies with the bushing .245,.246.,.247 can't get pass 22.5 IMR 4064, min @ H335 ,BLC-2, What is going on I've got other rounds loaded (600plus)of 223 ,75gr,68,69,75.shooting a win HV I've got pictures........loads started @BLC-2,22.5 good ,22.7 blew primer

OK, you say you are using Lake City military brass. Military brass can have up to ten percent less internal case volume than commercial. Starting loads in manuals are for commercial brass. You would need to lower your starting loads at least 10% below that. Little bitty cartridges like .222 and .223 are very sensitive to even a .1 grain variance.

I'm going to try that ,get a crono and see where i stand at with H335 @ 22.0gr plus some...i also got FC brass i will try.. military brass vs civilian brass right…thanks

27 December 2016, 04:51

scoutsout

quote:
Originally posted by Bobster:
With the heavy, long bearing surface bullets you say you are using the starting load should be closer to 20 grains with a guessed max around 22.5, using the LC brass. Yes, I'd get a chrono and see where you are at. Just because a manual lists start and max loads doesn't mean they are in stone for a given caliber. You have to do what is safe. I'm guessing you will find out you are achieving targeted velocities.

thanks … i am able to use 24.3gr of VARGET but not near that much with H335 or BLC-2 in lake city brass..