The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Guns, Politics, Gunsmithing & Reloading Reloading 30-378 & 338-378 weatherbysGo | New | Find | Notify | Tools | Reply | |
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I am a new user to this site. Wanted to touch base. I am interested to know if there are any of you who reload these calibers. I have an Accumark in 30-378 and 338-378 and have been developing loads over the past few months for mine and my friends rifle. Looking to trade/share information....Thanks JJS | ||
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Please go ahead and share some of your loads. I have a 30-378 in a sako trg-s that has been very fussy. It seems to like light bullets. Believe it or not but it is a good shooter with 125 and 150 grainers but seems to faulter on 165 on up. (Go figure). Anyhow the best hunting load I found to date is a 150 grain xlc under 108 grains of re22 for about 3700 fps. I've read alot of accuracy complaints on my particular gun--evidently it has a "too small" for caliber recoil lug which seems to make it change point of impact with the heavier recoiling bullets. Although, in general I've not seen alot of excellent accuracy results with the 30-378 caliber. Hope you've had better luck! | |||
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For my 30/378, H-50BMG seemed to be the best powder for the 180's, don't remember the load but it was 120+ grains. Work with Barnes, Nosler Partitions, and Ballistic Tips. They all shot pretty well. For my 338/378, I've probably had the most luck with RL25. I've used quite a bit of H-870 as well as some H-4831, which is actually on the fast side for the 30/378 and 338/378. Haven't had a chance to try Retumbo yet. | |||
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I used to have a 338/378 Wby. I found RL-25 to be very good with 250gr bullets. | |||
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The 30-378, after a lot of trial and error, we seem to be settled on the following load. I will provide you guys the following detail. Norma/Weatherby Brass trimmed to 2.903 Barnes Triple Shock 168 grain Retumbo 112 grains (you must start lower this is close to max load...so start at 109 grains and work up from there) Federal 215 Match Grade Primers Cartridge OAL: 3.642 avg. In three different 30-378's this load produces the following results. 100 yds groups of 1/2" or better. We have been testing this load at extreme ranges (and have had a great time shooting targets) 400, 500, 600, and 700 yards. We are getting sub minute of an angle out to 700 yards when we do our part. Nominal 3500 fps (Chornographed) and extreme velocity spread avg. 10 fps. Other powders which also produced good results were RL 22 and RL 25. I couple of notes. About 4 months ago I did some research in attempting to search out ways to improve upon the quality of my handloads. I had stopped reloading several years ago and wanted to be updated on what was available. I did several things to improve my case preparation and resizing operations. One of the most productive things I did (and least based on my obsevations) was to purchase a set of Forster Ultra Benchrest Dies and a Forster Press. I test my handloads on a RCBS case master guage. I can tell you that my handloads, as measured, are averaging .0015 to .001 vs about .0025 run out for the Weatherby factory stuff. I am so please with the Forster Dies, I am having Forster make me a set of 338-378 since they have not produce these dies before it is going to cost me extra. The 30-378 dies can be purchased for Cabelas, Midway USA, etc for about $72. Also, Swarovski's TDS scope is great for long range shooting. I purchased a 4-16x50mm with TDS and I have a significant advantage over my friends for now (I think they will be purchasing these scopes soon) at ranges past 500 yds as "hold over" error becomes more significant. I was so pleased with the TDS, I sent another PH 4-16x50mm w/Plex back to Swarovski so they could change the reticule to TDS. Although, Barnes does not have any load data for the TSX for these calibers, Ty at Barnes was very helpful in providing information. Other manufactuers were also very helpful! Let me know if this is helpful! Thanks JJS | |||
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Forgot about adding my 338-378 load. At this point, have not finished all my testing, the best load I have is working with 185 grain Barnes TSX with H4831sc. This load produces good accuracy (only tested at 100 yds, so far), 1/2 groups. Produces average velocity of 3460 fps. I hope to test at longer distance over the next few weeks. | |||
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Quote: What is the ogive on this Barnes load? Thanks | |||
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I have been reloading this caliber for 5 years with no good accuracy.I tried different Hodgdon powders(H-870,H-1000,H-50bmg,H-4831sc)different bullets(Nosler 150 and 180 Ballistic tip,Speer 180 grs spitzer boat tail,Barnes 180 grs XBT,Sieera Matk King (150),Speer 150 spitzer)Hornandy 150 grs interlock.The best I can do is 2inch at 100 yards.One day the rifle will�shoot within 1",the next day it will shoot 2".I let the barrel cooling down,sort out cases.I reload the .338 RUM,this one is easy to reload,can shoot everytime between .5-.7" | |||
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I found the best combination to be the Barnes TSX and Retumbo powder. I am loading this combination for 4 different 30-378 Accumark's they all will shoot the load at sub moa at 100. We have tested it out to 700 yards and it is still sub moa. Some of the details for the load are listed above. Ty at Barnes was very helpful in providing information. While speaking with him, he advised (prelieminary info. due to the fact that they are still develping TSX info and not reached the 30-378 yet) that they are seeing great accuracy out of the TSX line in the freebore Weatherby's. That bullet has proven to be the best in the loads we developed which included Swifts, Accubonds and others...and many of the powders you listed. I sort Brass (by measure, guage, wt,etc,) weight all charges, etc. My loaded rounds are better than .002 run out. Most of that I would attribute to the Brass prep, the consistentcy of processes, the Forester Co-Ax press I purchased in Jan., and the Forester Ultra Die sets. Are you still going to try to reload for you gun? If so I hope this helps you....JJS | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Guns, Politics, Gunsmithing & Reloading Reloading 30-378 & 338-378 weatherbys
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