175 grain 308 loads

MLC · October 17, 2002, 07:19 PM

Ok, out of the 3 reloading books I own none of them have data for a Sierra 175 grain bthp. I have Speer, Lyman and Nosler. What gives? This is the second Sierra bullet not in their manual.
I am all for experimentation, but I am also new to reloading so I am hesitant to jump right in. I figured I could start with Speer's 180 grain bthp data and watch for pressure signs. I have IMR 4064, 4895 and W760 in house. Any recommendations?

cookhj · October 17, 2002, 07:53 PM

with IMR 4064, i would start at 40 grs.
IMR 4895 works fine too, i believe i used 40 - 41.5 grs.
it probably wasn't in any reloading manuals because it is not a relatively common bullet and it is only used for competition.

C.R.Sam · October 17, 2002, 09:02 PM

Ask Sierra...
Their bullet.

Sam

moredes · October 17, 2002, 09:20 PM

Sierra lists the cartridge as:

2.800" OAL

Below, ignore all the /// marks (I couldn't get the columns to format without them). First row of numbers is Muzzle Velocity (in fps), second row of numbers (4064 charge weight), third row, (4895 charge weight at corresponding fps)

for IMR 4064,

2200 /// 2300 // / 2400 // / 2500 /// 2600
35.9gr / 38.0gr / 40.1gr / 42.2gr / 44.4 gr (maximum)

for IMR 4895

37.0gr / 38.5gr / 40.0gr / 41.5gr (maximum)

Sierra book lists accuracy load as IMR 4064/42.2gr: 2500fps/2498 ftlbs

I have found that IMR4064/42.5/ LC 93/Fed210M yields 2570fps @ .4MOA out of a Remington 700 BDL

IMR4064/43.5/LC 93/Fed210M yields 2650fps @.75MOA out of M1A

If you use milsurp brass reduce maximum powder charge listing by ~10%.

Skullboy · October 17, 2002, 10:29 PM

MLC, I called Sierra with the same question.I was told by one of their reps to use the 180 gr. bullet load data in their manual. I'm shooting them moly coated using 44.5 grs. of H-BLC2 with a Fed 215 magnum primer in Federal Match cases, seated to 2.815".This was giving me 2632 fps out of a Rem700 PSS.HTH.Skullboy.

MLC · October 17, 2002, 11:22 PM

Thanks guys, that was fast!
Somehow I grouped Sierra in with the CCI, Speer, Blount, RCBS etc. etc.
My bad.

sricciardelli · October 18, 2002, 11:06 AM

I suggest :
BL-C From 37.2 grains to 46.0 grains
Remington 9-1/2 Primer

For the other powders go to my reloading data pages...

C.R.Sam · October 18, 2002, 11:46 AM

When you go to Steve's site....prepare to spend some time there.
You will probably also bookmark it for later browsing.
Massive amounts of info and well laid out.

Sam

October 17, 2002, 07:19 PM	#1
MLC Senior Member Join Date: October 9, 2001 Location: New Hope, PA Posts: 230	175 grain 308 loads Ok, out of the 3 reloading books I own none of them have data for a Sierra 175 grain bthp. I have Speer, Lyman and Nosler. What gives? This is the second Sierra bullet not in their manual. I am all for experimentation, but I am also new to reloading so I am hesitant to jump right in. I figured I could start with Speer's 180 grain bthp data and watch for pressure signs. I have IMR 4064, 4895 and W760 in house. Any recommendations?

October 17, 2002, 09:20 PM	#4
moredes Senior Member Join Date: September 7, 2001 Posts: 325	175 SMK's Sierra lists the cartridge as: 2.800" OAL Below, ignore all the /// marks (I couldn't get the columns to format without them). First row of numbers is Muzzle Velocity (in fps), second row of numbers (4064 charge weight), third row, (4895 charge weight at corresponding fps) for IMR 4064, 2200 /// 2300 // / 2400 // / 2500 /// 2600 35.9gr / 38.0gr / 40.1gr / 42.2gr / 44.4 gr (maximum) for IMR 4895 37.0gr / 38.5gr / 40.0gr / 41.5gr (maximum) Sierra book lists accuracy load as IMR 4064/42.2gr: 2500fps/2498 ftlbs I have found that IMR4064/42.5/ LC 93/Fed210M yields 2570fps @ .4MOA out of a Remington 700 BDL IMR4064/43.5/LC 93/Fed210M yields 2650fps @.75MOA out of M1A If you use milsurp brass reduce maximum powder charge listing by ~10%.

October 17, 2002, 10:29 PM	#5
Skullboy Senior Member Join Date: September 25, 2002 Location: Haney, B.C. Canada Posts: 104	MLC, I called Sierra with the same question.I was told by one of their reps to use the 180 gr. bullet load data in their manual. I'm shooting them moly coated using 44.5 grs. of H-BLC2 with a Fed 215 magnum primer in Federal Match cases, seated to 2.815".This was giving me 2632 fps out of a Rem700 PSS.HTH.Skullboy. __________________ DAMAGE INC. CUSTOM CAMO. If They Call It Tourist Season, Why Can't We Shoot Them?

October 18, 2002, 11:06 AM	#7
sricciardelli Senior Member Join Date: August 13, 2001 Location: Montana Posts: 489	I suggest : BL-C From 37.2 grains to 46.0 grains Remington 9-1/2 Primer For the other powders go to my reloading data pages... __________________ http://stevespages.com/page8.htm

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

October 17, 2002, 07:53 PM	#2
cookhj Senior Member Join Date: October 30, 2001 Posts: 330	with IMR 4064, i would start at 40 grs. IMR 4895 works fine too, i believe i used 40 - 41.5 grs. it probably wasn't in any reloading manuals because it is not a relatively common bullet and it is only used for competition.

October 17, 2002, 09:02 PM	#3
C.R.Sam Senior Member Join Date: October 29, 1999 Location: Dewey, AZ Posts: 12,858	Ask Sierra... Their bullet. Sam

October 17, 2002, 11:22 PM	#6
MLC Senior Member Join Date: October 9, 2001 Location: New Hope, PA Posts: 230	Thanks guys, that was fast! Somehow I grouped Sierra in with the CCI, Speer, Blount, RCBS etc. etc. My bad.

October 18, 2002, 11:46 AM	#8
C.R.Sam Senior Member Join Date: October 29, 1999 Location: Dewey, AZ Posts: 12,858	When you go to Steve's site....prepare to spend some time there. You will probably also bookmark it for later browsing. Massive amounts of info and well laid out. Sam