compressed loads with xtp bullets

98 220 swift · May 13, 2015, 03:08 PM

I am running a compressed load of AA9 with a 180 gr xtp in my 10mm. The problems is when seating the bullet the hollow point gets semi closed up when putting the extra pressure needed to compress the powder. Is this a problem? Any way to stop this? I am using lee dies. This does not happen with any other loads just the compressed one.

T. O'Heir · May 13, 2015, 03:29 PM

Accurate doesn't indicate there is a compressed 180 grain #9 load. And their site lists a 180 XTP. 12.2 to 13.5. No compressed loads.
Shouldn't be any more pressure required to seat a compressed load than any other load either.
You're likely using an RN seating button. Use the FP button. Makes no difference anyway. HP's rely on velocity to expand, not how big the hole is.

Nick_C_S · May 13, 2015, 08:07 PM

I have Hornady 9th. They show their 180gn XTP running from 11.5gn (950 f/s) to 14.9gn (1250 f/s). There is no mention of a compressed load. COL 1.260".

Something seems wrong.

1100 tac · May 13, 2015, 09:05 PM

Anyway, if you still have fingers to type with, tell us exactly what load you are running that is compressed, the other details may be of some interest also...

98 220 swift · May 13, 2015, 09:20 PM

14.5 gr of aa9 Starline cases. No pressure signs all shot fine.

skizzums · May 14, 2015, 05:19 AM

I loaded a batch of 147 xtp's that I had the same problem with. I didn't notice it at first, but all my HP's are inconsistent. I found out it was because I was crimping the case before my bullet was completely seated. if you are crimping and seating in the same step, try backing the body of the die out and setting the seater stem deeper.

TimSr · May 14, 2015, 07:33 AM

If you are deforming your bullet to "compress" your powder charge, you are exceeding what they mean by "compressed". You are also going to affect your accurracy when you deform your bullet.

If its just a case of a soft point being deformed with ordinary pressure, most dies have differnet seating stems for different shaped bullets. Somemtimes a seating stem from another die in a different caliber is the solution for this to put seating force on the bullet somewhere besides the tip.

May 13, 2015, 03:08 PM	#1
98 220 swift Senior Member Join Date: January 4, 2015 Location: Perryville MO Posts: 426	compressed loads with xtp bullets I am running a compressed load of AA9 with a 180 gr xtp in my 10mm. The problems is when seating the bullet the hollow point gets semi closed up when putting the extra pressure needed to compress the powder. Is this a problem? Any way to stop this? I am using lee dies. This does not happen with any other loads just the compressed one.

May 13, 2015, 03:29 PM	#2
T. O'Heir Senior Member Join Date: February 13, 2002 Location: Canada Posts: 12,453	Accurate doesn't indicate there is a compressed 180 grain #9 load. And their site lists a 180 XTP. 12.2 to 13.5. No compressed loads. Shouldn't be any more pressure required to seat a compressed load than any other load either. You're likely using an RN seating button. Use the FP button. Makes no difference anyway. HP's rely on velocity to expand, not how big the hole is. __________________ Spelling and grammar count!

May 13, 2015, 08:07 PM	#3
Nick_C_S Senior Member Join Date: March 21, 2013 Location: Idaho Posts: 5,523	Bells n whistles going off I have Hornady 9th. They show their 180gn XTP running from 11.5gn (950 f/s) to 14.9gn (1250 f/s). There is no mention of a compressed load. COL 1.260". Something seems wrong. __________________ Gun control laws benefit only criminals and politicians - but then, I repeat myself. Life Member, National Rifle Association

May 14, 2015, 05:19 AM	#6
skizzums Senior Member Join Date: July 1, 2013 Location: Douglasville, Ga Posts: 4,615	I loaded a batch of 147 xtp's that I had the same problem with. I didn't notice it at first, but all my HP's are inconsistent. I found out it was because I was crimping the case before my bullet was completely seated. if you are crimping and seating in the same step, try backing the body of the die out and setting the seater stem deeper. __________________ My head is bloody, but unbowed

May 13, 2015, 09:05 PM	#4
1100 tac Senior Member Join Date: February 7, 2012 Posts: 299	Anyway, if you still have fingers to type with, tell us exactly what load you are running that is compressed, the other details may be of some interest also...

May 13, 2015, 09:20 PM	#5
98 220 swift Senior Member Join Date: January 4, 2015 Location: Perryville MO Posts: 426	14.5 gr of aa9 Starline cases. No pressure signs all shot fine.

May 14, 2015, 07:33 AM	#7
TimSr Senior Member Join Date: March 8, 2013 Location: Rittman, Ohio Posts: 2,074	If you are deforming your bullet to "compress" your powder charge, you are exceeding what they mean by "compressed". You are also going to affect your accurracy when you deform your bullet. If its just a case of a soft point being deformed with ordinary pressure, most dies have differnet seating stems for different shaped bullets. Somemtimes a seating stem from another die in a different caliber is the solution for this to put seating force on the bullet somewhere besides the tip.