Firearm & Gun Forum - FireArmsTalk.com > Gear & Accessories > Ammunition & Reloading > Help with W748 308 load.

Reply
 
LinkBack Thread Tools Display Modes
Old 07-28-2013, 01:18 AM   #1
Feedback Score: 0 reviews
 
Join Date: Feb 2013
Posts: 505
Liked 183 Times on 143 Posts
Likes Given: 89

Default Help with W748 308 load.

Have been trying to work up a 180gr load for my fantastic M70 Featherweight 308, I tried most of the loads in my "go to" Nolser manual with so-so results, but then I tried a load off the IMR/Winchester site. I worked up to the max load of 46.5gr of W748 and it shot fantastic (.4" groups), upon posting my results I was informed that I was shooting a 70,000+psi load! Or at leased that is what Quickload said anyway, my rifle showed no clear pressure signs and IMR/Winchester says that load is only 48,500CUP, but on the flip side again 46.5gr of W748 is a bit higher then anyone elses max load which is usually around 44gr.
What are your thoughts? Is this load playing with fire, or is IMR/Winchester right in calling this a safe load?



__________________
Apex-Predator is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 07-28-2013, 01:56 AM   #2
Feedback Score: 0 reviews
 
Join Date: Mar 2013
Posts: 418
Liked 219 Times on 120 Posts
Likes Given: 83

Default

What 180gr bullet are you loading?

Did you shoot these over a Chrony?

What is your barrel length?

Can you give me your case capacity in grains of H20? Take a fired case. weigh it. Fill it with H20 and weigh again, subtract and that is your case capacity in grains of H20.

Did you work up to 46.5gr?

Your load is up there, but I can't say that it is over pressure, depending on your bullet, there is data to support the charge.

I'll run QL for you if you can supply me with the case capacity, barrel length and bullet.



__________________
mseric is offline  
 
Reply With Quote
Old 07-28-2013, 08:52 PM   #3
Feedback Score: 0 reviews
 
Join Date: Feb 2013
Posts: 505
Liked 183 Times on 143 Posts
Likes Given: 89

Default

Sierra Game King 180gr, VERY similar to the 180gr Speer BTSP used my IMR/Winchester, yes I did work up from 43gr, length is 2.800", barrel is a 22" (1:12" twist Winchester factory), no I did not chrono but it did kick hard for a 308 and POI was almost an inch above my factory 150gr Core-Lokt zero. I would get you my case readings but I am out of town at the moment and did not bring any brass with me. I used Remington brass for that load, FL resized of course. That rifle gets a sticky bolt pretty easy and that load extracted just fine.

__________________
Apex-Predator is offline  
 
Reply With Quote
Old 07-29-2013, 02:18 AM   #4
Moderator
FTF_MODERATOR.png
Feedback Score: 0 reviews
 
JonM's Avatar
 
Join Date: Nov 2009
Location: Rochester WI,Rochester WI
Posts: 16,224
Liked 4465 Times on 2355 Posts
Likes Given: 255

Default

any reason for 180 grain bullets??

thats not really a good bullet for the 308 and is something you would use in a 30-06 or 300winmag.

when your running close to or at the book max you need to be wary of things like your barrel length vs the test barrel, are you using the exact same cases primers and exact same bullets??

heavy bullets can be accurate in the 308 but they generally lack the case capacity to safely ramp the speed up.

__________________

"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith

The problem with being stupid is you cannot simply decide to stop doing dumb things...

JonM is offline  
 
Reply With Quote
Old 07-29-2013, 03:19 AM   #5
Crazy Azz Redneck
FTF_SUPPORTER.png
Feedback Score: 0 reviews
 
Txhillbilly's Avatar
 
Join Date: Oct 2008
Posts: 3,309
Liked 990 Times on 565 Posts
Likes Given: 440

Default

If your not seeing high pressure signs on your brass,I wouldn't worry about it too much.
Most published load data is well below the maximum limits on any caliber,although most accurate loads are well below maximum powder charges.

I would also choose a lighter bullet to hunt with in a 308,I prefer 165 or 168 grain hunting bullets,but I do shoot heavier target bullets out of my 308.

__________________

Lifetime Member-
NRA
Texas State Rifle Association
North American Hunting Club

Txhillbilly is offline  
 
Reply With Quote
Old 07-29-2013, 04:02 PM   #6
Feedback Score: 0 reviews
 
Join Date: Feb 2013
Posts: 505
Liked 183 Times on 143 Posts
Likes Given: 89

Default

165gr was my first choice but my rifle simply does not like them at all, tried SKGs, SSTs, BTs, amongst others, with most suitable 308 powders (RL15, Varget, W748....etc) and the best group I had was a marginal 1.25" so I decided to use either 150gr or 180gr both of which shot .5" or better off the bench. I have always preferred heavy bullets over light and faster ones in the woods. I don't need or want hypersonic speed in my 308, that is my woods rifle so even a "slow" 180gr should preform well inside 150 yards assuming I am using a fast expanding bullet like a SGK, SST, or Speer BTSP. I have a 270WSM for when I want to push lead to 3,400fps.

__________________
Apex-Predator is offline  
 
Reply With Quote
Old 07-29-2013, 04:31 PM   #7
Feedback Score: 0 reviews
 
Join Date: Feb 2013
Posts: 505
Liked 183 Times on 143 Posts
Likes Given: 89

Default

Not doubting that the 150gr 308 could work but a 165gr is the smallest 30 cal I have ever used on game, I REALLY like exit wound in thick brush and I don't have as much confidence in a lighter projectile. Maybe the 150gr Speer BTSP will exceed my expectations but I know for a fact that a 180gr smashes bone and keeps on going.

__________________
Apex-Predator is offline  
 
Reply With Quote
Old 07-29-2013, 04:48 PM   #8
Feedback Score: 0 reviews
 
Join Date: Mar 2013
Posts: 418
Liked 219 Times on 120 Posts
Likes Given: 83

Default

Quote:
Originally Posted by Apex-Predator View Post
Not doubting that the 150gr 308 could work but a 165gr is the smallest 30 cal I have ever used on game, I REALLY like exit wound in thick brush and I don't have as much confidence in a lighter projectile. Maybe the 150gr Speer BTSP will exceed my expectations but I know for a fact that a 180gr smashes bone and keeps on going.

Use what you have confidence in and are comfortable with. If that is the 180gr then go with it and don't let anyone talk you into a bullet you do not have total faith in.
__________________
mseric is offline  
 
Reply With Quote
Old 07-31-2013, 01:04 AM   #9
Moderator
FTF_MODERATOR.png
Feedback Score: 0 reviews
 
JonM's Avatar
 
Join Date: Nov 2009
Location: Rochester WI,Rochester WI
Posts: 16,224
Liked 4465 Times on 2355 Posts
Likes Given: 255

Default

Quote:
Originally Posted by Apex-Predator View Post
Not doubting that the 150gr 308 could work but a 165gr is the smallest 30 cal I have ever used on game, I REALLY like exit wound in thick brush and I don't have as much confidence in a lighter projectile. Maybe the 150gr Speer BTSP will exceed my expectations but I know for a fact that a 180gr smashes bone and keeps on going.
i used a 150 grain a-max from hornady last hunting season in my scar17. that is one NASTY bullet. you know how some hollywood movies you see that red mist.... this bullet produces that with shot to the boiler room.

took two deer, one was chest shot it liquified the heart and lungs with a complete pass through leaving huge chunks of tissue and a massive blood pool the deer just dropped. i could see where the spray landed on the ground and vegatation. tracking that sort of trail you woulda had to be blind if the deer wandered off.

the second one i did a neck shot and it all but decapitated the deer.

both shots went through. the only guns i have that perform equal are my 45-70 and 458 winmag.

im so impressed by the amax i put those in my ohsht scar mags.

i highly recomend getting some load em up and give em a try
__________________

"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith

The problem with being stupid is you cannot simply decide to stop doing dumb things...

JonM is offline  
 
Reply With Quote
Old 08-01-2013, 03:21 AM   #10
Feedback Score: 0 reviews
 
Join Date: Feb 2013
Posts: 505
Liked 183 Times on 143 Posts
Likes Given: 89

Default

That damage sounds like what my 165gr 30-06 load does, no joke it left a basketball sized exit wound on the last deer of last season, SGKs at 2900fps speeds make a mess of a deer on close ranged shots. Neck, shoulder and back were all blown out like it had swallowed a hand grenade, while that makes for lightening quick ethical kills that is more meat damage then I care for.



__________________
Apex-Predator is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
How to "Ghost Load" or "Carrier Load" or "Float a Round" a Shotgun Amsdorf General Shotgun Discussion 19 02-21-2014 05:35 AM
If i load ten a day Tenderribbs Ammunition & Reloading 7 04-23-2013 05:23 AM
M118 and W748 JonM Ammunition & Reloading 3 11-23-2012 06:42 PM
best load for a .338 win mag? cakesterkiller Ammunition & Reloading 15 05-26-2012 01:44 PM
Pet Load fmj Ammunition & Reloading 10 11-02-2011 04:55 PM