Does anyone have reloading data for 300 Weatherby Mag using the Berger 205 grain elite hunter bullets?
- Thread starter Mark1989
- Start date
Don't have a Weatherby, but first time taking the 300 RUM out with the 205 Berger today. Simply went out with a 14 shot ladder worked up in .5 gr increments to find pressure signs. All rounds fired over a Magneto Speed Sporter.
Gun is:
Rem 700 LA, blue printed and trued by W.A.R Rifles in Manassas VA
Orginal trigger (old type rem trigger) they worked over is now very smooth and crisp
Krieger barrel: 26in #5 heavy sporter profile, 1:10 twist,
Chambered in 300 RUM by WAR Rifles
Area 419 break
Magpul Hunter stock
Conditions : Cold, low 40's, and dry in Northern VA.
Load data:
Norma virgin brass
205gr elite hunter
Federal 215M primers
Retumbo powder - ladder starting at 88gr and going to 94.5gr. 14 rounds total in 0.5gr increments
OAL 3.600
Results:
Shots were into a berm at 30 yards, so no accuracy testing this session.
The jump in velocity from 91.0 to 91.5 was interesting to me. The recoil, report and bolt lift all discernablly changed when I hit 92gr charge. I decided to stop after shooting 93.5gr. This is going to primarly be a hunting rifle, and I am planning on it being my primary on a moose hunt to Newfoundland this fall. I want a load that can be shot in bad weather and not experience crazy pressure swings.
From this data, I am considering loading up 25 rounds each of 89.7 & 90.7, and shooting these batches to see which give the best ES/SD, and then confirming groups are what I expect (0.5MOA or better).
If the 90.7 load proves stable and consistent around 3075 to 3100fps, we might have a winner.
Only have about 60 rounds down the barrel, so it could pick up some speed still too.
More to come.
Gun is:
Rem 700 LA, blue printed and trued by W.A.R Rifles in Manassas VA
Orginal trigger (old type rem trigger) they worked over is now very smooth and crisp
Krieger barrel: 26in #5 heavy sporter profile, 1:10 twist,
Chambered in 300 RUM by WAR Rifles
Area 419 break
Magpul Hunter stock
Conditions : Cold, low 40's, and dry in Northern VA.
Load data:
Norma virgin brass
205gr elite hunter
Federal 215M primers
Retumbo powder - ladder starting at 88gr and going to 94.5gr. 14 rounds total in 0.5gr increments
OAL 3.600
Results:
| Powder charge | FPS | Notes |
| 88 | 2965 | No Pressure signs |
| 88.5 | 2971 | No Pressure signs |
| 89 | 3017 | No Pressure signs |
| 89.5 | 3035 | No Pressure signs |
| 90 | 3042 | No Pressure signs |
| 90.5 | 3068 | No Pressure signs |
| 91 | 3066 | No Pressure signs |
| 91.5 | 3136 | No Pressure signs |
| 92 | 3122 | Slight ejector swipe |
| 92.5 | 3159 | More noticeable ejector swipe, slightly heavy bolt lift |
| 93 | 3179 | clear ejector swipe, heavy bolt lift |
| 93.5 | 3191 | ejector swipe, heavy bolt lift |
| 94 | 0 | Did not shoot |
| 94.5 | 0 | Did not shoot |
Shots were into a berm at 30 yards, so no accuracy testing this session.
The jump in velocity from 91.0 to 91.5 was interesting to me. The recoil, report and bolt lift all discernablly changed when I hit 92gr charge. I decided to stop after shooting 93.5gr. This is going to primarly be a hunting rifle, and I am planning on it being my primary on a moose hunt to Newfoundland this fall. I want a load that can be shot in bad weather and not experience crazy pressure swings.
From this data, I am considering loading up 25 rounds each of 89.7 & 90.7, and shooting these batches to see which give the best ES/SD, and then confirming groups are what I expect (0.5MOA or better).
If the 90.7 load proves stable and consistent around 3075 to 3100fps, we might have a winner.
Only have about 60 rounds down the barrel, so it could pick up some speed still too.
More to come.
