Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

Reloading suggestions for .338 Lapua

 
LinkBack Thread Tools Display Modes
  #15  
Old 04-17-2012, 09:36 PM
Silver Member
 
Join Date: Jul 2009
Posts: 242
Re: Reloading suggestions for .338 Lapua

Like green 788, i too use retumbo (89.0grns) with the 300 grain Sierra Match Kings with .5 minute or better results.

For 250 grain SMKs I use 86.0 grains of H4831SC.

Quote:
Originally Posted by green 788 View Post
It sounds like it's already doing very well. Flyers 2 inches to the left of a 1.5 inch group at 400 yards can easily be explained by a tiny amount of wind you didn't see (about a 3 mph wind would do it)... or just the trigger pull or bi-pod loading (pushing harder against one leg than the other) could do it... it's hard to say for sure. Seating depth adjustments can reel in flyers in many cases too.

I've used Retumbo in my 110BA, and it has done well. I've shot the 300 grain Sierra Matchkings as fast as 2800 fps (with 92 grains of Retumbo), and that was a very accurate load. But due to pressure signs (flat primer, ejector swipe) I decided to drop the charge to 89.3 grains in Lapua brass, and it works very well also. That gives 2700 fps.

I tried that load at 600 yards just yesterday...



This was the load with a cold clean bore shot. My rifle is at around 120 rounds as of now, still breaking in... and it likes at least 2 fouler shots before it starts 1/2 MOA accuracy. My first fouler shot from a cold clean bore goes about 1/3 MOA low, and slightly right. (see 100 yard target below). I had 3 to 5 mph winds on the 600 yard target, and the low shot in that group was the second shot from a cold clean bore. I don't know why it printed left (wind, or just me)... but low for that shot is the norm in my rifle.



The guys reporting that Retumbo is temperature sensitive are just running their loads too hot. They switch to another powder that won't let them run so fast and they say "voila, this powder isn't as temp sensitive." But Retumbo isn't all that temp sensitive either if you're running sane pressures...

Dan
__________________
J



AR's for coyotes
25-06 M70 for coyotes
6.5-06 Remington Custom w/Leupold Mark IV 6.5-20 tactical setup
AR10 for mule deer
6.5-06 M700 for mule deer
338 Lapua Mag M700 for elk
Reply With Quote
  #16  
Old 04-18-2012, 02:12 AM
Silver Member
 
Join Date: Aug 2009
Location: Texas
Posts: 147
Re: Reloading suggestions for .338 Lapua

I could definitely use some advice as well for this load, and I believe the same rifle (savage 111 338LM).

I havent been reloading long, and keep realizing how much I dont know from reading these posts. I am basically holding the reloading manual's hand in everything, so customizing a load for my rifle is driving me crazy.

I thought I had a great load for the rifle last week. I had a 3 shot group sharing the same hole at 100 yards. After being tickled pink, I called it a day since it was almost dark and decided to come back a couple days later to dial in my zero. However, the next time I shot the same round, I had a group of 1.25" at 100. The loads should have been the exact same as I did them at the same time. The only thing I can think of is that I somehow switched OALs in the middle. I doubt it, but its possible. My notes for the load listed the OAL from Sierra and Lyman as noted below. Would that make that much of a difference at 100?

Sierra MK 250gr.
H1000 93 gr.
Federal Match Mag. Primer
OAL 3.680 (Sierra Manual) 3.565 (Lyman Manual)

I made a rookie mistake and didnt note which one of the OAL I used.

I am now stair stepping H1000 and R25 through a "quick load" computer program output that someone did for me on this rifle using:

Hornady Brass,
OAL 3.565
and a Sierra MK 250 gr.
(R25 81.5 gr --88.6 gr) (H1000 84gr--90.8gr).

I have finished testing R25 and only found a decent 4 shot group with 81.5gr producing a 3 shot group of .37 MOA and one flyer. All of the other R25 loads were .60 MOA or greater.

I have attempted to figure out what my chamber OAL so that the bullet is all the way in the lands of the rifle. (Sound right?) I followed some advice I read about coloring the bullet of a dummy round with black marker and chambering it to see where it seated on the lands, then taking down the OAL until it rested on the edge of the case rim. I have no idea if that is right, but I THINK it rested at 3.545 OAL. I didnt think I did it correctly since it was so short compared to all of the manual OALs I have seen.

Geez. Its like the blind leading the blind around here. I cant get my shots to consistently group well and I am not sure what I am doing wrong. Very frustrating.
Any advice for me?
__________________




Reply With Quote
  #17  
Old 04-18-2012, 05:44 AM
Gold Member
 
Join Date: Feb 2005
Posts: 564
Re: Reloading suggestions for .338 Lapua

If you're loading the cartridges in the magazine, per chance, make sure they have plenty of neck tension. If you're using bushing type or collet dies, you can sometimes not get enough neck tension... and the bullets in the cartridges in the mag well can shift under recoil. Varied seating depths will move the POI all over the place...

Cold, clean bore shots will, as a rule, be out of the group to some degree. At this point, my rifle is liking 2 shots from a cold clean bore before settling down to group. The low shot in my 600 yard target above was the 2nd shot from ccb. I put the first shot off paper, just to verify scope setting was correct. So if your barrel is still breaking in (less than 100 shots or so), you should expect some sporadic grouping. That's just how it is with factory barrels... tool marks and other anomalies can give you a fit for a little while, holding copper and fouling. But it'll smooth out, and being a button rifled barrel, it'll shoot in many cases as well as a custom barrel--once it's been broken in. I have half a dozen Savage rifles to base that claim on, by the way.

Click the link at the bottom of my post, and check out my OCW method of load development... this should help you a lot in eliminating flyers and getting to the right charge level with the minimum amount of shots fired (important especially when shooting a dollar's worth of material every time you pull the trigger). :o

The 300 grain bullets are more closely matched to the Savage's 9 twist... but the 250's should work, in the right recipe.

Holding the loading manual's hand is never a bad idea, by the way.

Dan
Reply With Quote
  #18  
Old 04-18-2012, 12:03 PM
Silver Member
 
Join Date: Aug 2009
Location: Texas
Posts: 147
Re: Reloading suggestions for .338 Lapua

Quote:
Originally Posted by green 788 View Post
If you're loading the cartridges in the magazine, per chance, make sure they have plenty of neck tension. If you're using bushing type or collet dies, you can sometimes not get enough neck tension... and the bullets in the cartridges in the mag well can shift under recoil. Varied seating depths will move the POI all over the place...

Cold, clean bore shots will, as a rule, be out of the group to some degree. At this point, my rifle is liking 2 shots from a cold clean bore before settling down to group. The low shot in my 600 yard target above was the 2nd shot from ccb. I put the first shot off paper, just to verify scope setting was correct. So if your barrel is still breaking in (less than 100 shots or so), you should expect some sporadic grouping. That's just how it is with factory barrels... tool marks and other anomalies can give you a fit for a little while, holding copper and fouling. But it'll smooth out, and being a button rifled barrel, it'll shoot in many cases as well as a custom barrel--once it's been broken in. I have half a dozen Savage rifles to base that claim on, by the way.

Click the link at the bottom of my post, and check out my OCW method of load development... this should help you a lot in eliminating flyers and getting to the right charge level with the minimum amount of shots fired (important especially when shooting a dollar's worth of material every time you pull the trigger). :o

The 300 grain bullets are more closely matched to the Savage's 9 twist... but the 250's should work, in the right recipe.

Holding the loading manual's hand is never a bad idea, by the way.

Dan
I appreciate the helpful reply. I was up late last nite reading your article. Very informative. I plan on doing that very soon. I am not sure what powder the run with though. Perhaps retumbo? I also plan on ordering some 300 smk. I'm just going to use mag length for my OAL as well.
I have been shooting them through the mag and without the mag. I am not sure about the collet. I use the Lyman set for the 338. Should it say on the die or do I need to look for something within it?
__________________




Reply With Quote
  #19  
Old 04-18-2012, 05:09 PM
Gold Member
 
Join Date: Feb 2005
Posts: 564
Re: Reloading suggestions for .338 Lapua

the Lyman set is what I'm also using, and it works well... that's an FL set (full length).

I'm not a fan or collet or bushing dies... I don't say much about that around here as not to stir up a fuss... But suffice it to say that properly used FL dies will work very well, giving good neck tension, which is what you want.

Dan
Reply With Quote
  #20  
Old 04-18-2012, 10:30 PM
Bronze Member
 
Join Date: Jul 2011
Location: manitoba, canada
Posts: 80
Re: Reloading suggestions for .338 Lapua

Quote:
Originally Posted by Texas Republic View Post
I appreciate the helpful reply. I was up late last nite reading your article. Very informative. I plan on doing that very soon. I am not sure what powder the run with though. Perhaps retumbo? I also plan on ordering some 300 smk. I'm just going to use mag length for my OAL as well.
I have been shooting them through the mag and without the mag. I am not sure about the collet. I use the Lyman set for the 338. Should it say on the die or do I need to look for something within it?
hey there texas... i say try the retumbo with the 300's when you get them... it seems: Savage + 338lapua + ~89gr retumbo + 300gr SMK has been working real well for a bunch of us...
just a word of caution on loading them to mag length, with any round, if you are jamming into the lands with a long oal you may end up getting a couple bullets stuck in the throat. if you chamber a round and then decide not to shoot it and go to eject the unfired round, you might end up spilling powder all over the place and be forced to get the cleaning rod out to tap the projectile outa your barrel (trust me its happened to me )

of course this scenario is less likely when you have good tight neck tension (as green 788 mentioned) but still happens

also if you load those 250's (not sure if that was your intention?) to mag length i am pretty sure you will be jamming them into the lands big time.... ( see previous ...found out when i was playing around with testing 250's that their ogive profile is much different then their 300gr big brothers... )

now i'm not saying jamming into the lands wont yield you a good accurate load... i have a couple loads for some guns that shoot lights out with the bullet jammed into the lands... all of the loads i have found that like being jammed are VLD style bullets ie: bergers... also keep in mind that when you have the bullets jammed you will get higher pressure (more velocity) for lower powder load...

with the more conventional bullets like the SMK's, lapua scenar's, accubond's etc, i have found they do better seated back about 10 to 30 thousandths off the lands.... so i'd say use the technique with the marker and dummy round to find the lands, it works, thats how i have been figuring it out not sure you do the thing with seating the bullet in deeper to the riffling smudges in the marker to the mouth of the case though, i just measure the length of the rifling smudge and take that off the oal of the dummy round... sinclair also makes a good oal guage....

orch

ps. green 788... Quit bashing bushing dies! you're gonna stir me up into a fuss if you keep that up!
Reply With Quote
  #21  
Old 04-19-2012, 07:47 AM
Gold Member
 
Join Date: Feb 2005
Posts: 564
Re: Reloading suggestions for .338 Lapua

... I wasn't bashing them, per se... just stating my preference for FL dies in field rifles, that's all.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Reloading suggestions for .338 Lapua
Thread Thread Starter Forum Replies Last Post
SUggestions for 300RUM reloading shuamee Reloading 0 09-08-2011 09:05 PM
need data and suggestions for 338 lapua ragman Reloading 15 02-17-2010 12:04 AM
reloading equip suggestions Deuce 2 The Basics, Starting Out 4 11-23-2007 05:03 PM
Suggestions on pre-made reloading bench? encoreguy Reloading 2 09-08-2007 09:27 PM
new to reloading - suggestions??? danacobb The Basics, Starting Out 5 06-22-2004 08:08 PM

Current Poll
Do You Shoot Rifle Competition?
YES - 33.75%
764 Votes
NO - 66.25%
1,500 Vote
Total Votes: 2,264
You may not vote on this poll.

All times are GMT -5. The time now is 07:41 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC