Calvin45
Well-Known Member
The 240 Gibbs has long intrigued me
What is the the most flat shooting cartridge yall can think of?
- Thread starter DUCKMAN11
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264WM
Well-Known Member
264WM
| Trajectory | |||
| Input Data | |||
| Ballistic Coefficient: | 0.620 G1 | Caliber: | 0.264 in |
| Bullet Weight: | 130.0 gr | ||
| Muzzle Velocity: | 3239.0 ft/s | Distance to Chronograph: | 20.0 ft |
| Sight Height: | 1.50 in | Sight Offset: | 1.00 in |
| Zero Height: | 0.00 in | Zero Offset: | 0.00 in |
| Windage: | 0.000 MOA | Elevation: | 0.000 MOA |
| Line Of Sight Angle: | 0.0 deg | Cant Angle: | 0.0 deg |
| Wind Speed: | 10.0 mph | Wind Angle: | 90.0 deg |
| Target Speed: | 10.0 mph | Target Angle: | 90.0 deg |
| Target Height: | 12.0 in | ||
| Temperature: | 70.0 °F | Pressure: | 29.92 in Hg |
| Humidity: | 0 % | Altitude: | 0.0 ft |
| Vital Zone Radius: | 5.0 in | ||
| Std. Atmosphere at Altitude: | No | Pressure is Corrected: | Yes |
| Zero at Max. Point Blank Range: | No | Target Relative Drops: | Yes |
| Mark Sound Barrier Crossing: | No | Include Extra Rows: | No |
| Column 1 Units: | 1.00 in | Column 2 Units: | 1.00 MOA |
| Round Output to Whole Numbers: | No | ||
| Output Data | |||
| Elevation: | 4.860 MOA | Windage: | 0.000 MOA |
| Atmospheric Density: | 0.07488 lb/ft³ | Speed of Sound: | 1128.2 ft/s |
| Maximum PBR: | 401 yd | Maximum PBR Zero: | 340 yd |
| Range of Maximum Height: | 186 yd | Energy at Maximum PBR: | 1996.8 ft•lbs |
| Sectional Density: | 0.266 lb/in² |
| Range | Drop | Drop | Windage | Windage | Velocity | Mach | Energy | Time | Lead | Lead |
|---|---|---|---|---|---|---|---|---|---|---|
| (yd) | (in) | (MOA) | (in) | (MOA) | (ft/s) | (none) | (ft•lbs) | (s) | (in) | (MOA) |
| Calculated Table | ||||||||||
| 0 | -1.5 | *** | -1.0 | *** | 3250.1 | 2.881 | 3048.6 | 0.000 | 0.0 | *** |
| 50 | 0.6 | 1.2 | -0.9 | -1.7 | 3167.8 | 2.808 | 2896.1 | 0.047 | 8.2 | 15.7 |
| 100 | 1.9 | 1.8 | -0.6 | -0.5 | 3087.0 | 2.736 | 2750.3 | 0.095 | 16.7 | 15.9 |
| 150 | 2.2 | 1.4 | -0.0 | -0.0 | 3007.8 | 2.666 | 2610.9 | 0.144 | 25.3 | 16.1 |
| 200 | 1.6 | 0.8 | 0.7 | 0.4 | 2929.9 | 2.597 | 2477.6 | 0.194 | 34.2 | 16.3 |
| 250 | -0.0 | -0.0 | 1.7 | 0.7 | 2853.5 | 2.529 | 2350.0 | 0.246 | 43.4 | 16.6 |
| 300 | -2.7 | -0.9 | 3.0 | 1.0 | 2778.4 | 2.463 | 2227.8 | 0.300 | 52.7 | 16.8 |
| 350 | -6.5 | -1.8 | 4.5 | 1.2 | 2704.5 | 2.397 | 2110.9 | 0.354 | 62.4 | 17.0 |
| 400 | -11.5 | -2.7 | 6.3 | 1.5 | 2631.8 | 2.333 | 1999.0 | 0.411 | 72.3 | 17.3 |
| 450 | -17.8 | -3.8 | 8.3 | 1.8 | 2560.3 | 2.269 | 1891.8 | 0.468 | 82.4 | 17.5 |
| 500 | -25.4 | -4.8 | 10.7 | 2.0 | 2489.9 | 2.207 | 1789.3 | 0.528 | 92.9 | 17.7 |
6.5-300 Weatherby
DustThroughaFan
Well-Known Member
I wonder what a barrel with the correct twist rate for the lighter bullet would do for them? Say a winmag or a rum with a 14 twist. It'd be a one trick pony at thst point but it would be fast.
Calvin45
Well-Known Member
Talk to @scope-eye about this…he's done lots of that kind of thing
Just thinking out loud; if you are a hand loader you can "really" make a .257 Wby Mag scream, would most of you .257 Wby Mag shooters agree? From all the calibers I've owned over the years this also seemed to be the case when I was trying to get a flat shooting cartridge to "really" move out, the .257 Wby Mag always seemed to be the best one out too around 500 yards, with an easy to carry hunting rifle, weight and recoil wise. Just my 0.2 Cheers
WYO300RUM
Well-Known Member
I have a great shooting load for my 257 Weatherby Vangaurd I won on $10 raffle ticket with RL26 and Barnes 100 gr. TTSX at 3664 fps. 26 in. barrel. No pressure. 101 LRX almost same. H1000 shot almost as good but 100 fps slower. Going to try Hammer 95 gr. Tipped with same load soon. Hope get same accuracy and I'm sure more fps.
Calvin45
Well-Known Member
That's cookin! I could only get the 100 tsx to 3500 or so with imr 7828 in my 24 inch.
But I was able to get the 100 Nosler ballistic tip to 3700, again with 7828.
75 grain hammer to 4150 with rl17.
Got some Berger 115s I haven't experimented with and may never use, might just save the precious barrel life haha
WYO300RUM
Well-Known Member
I have a bunch of 25 cal. bullets want to try. 115 ELDX. 110 Accubond. 100 Nosler BT. Hornady 117 SST and Interlock. Speer 120 SBT. Next is the 95 gr. Hammer HT. The only other 25 cal. I have is a 25 Bullberry Contender rifle barrel. A 30-30 case necked down to 25 cal with AI shoulder. It loves Speer 100 gr. SBT. Integral break 21 in. Barrel. Recoil less then a 223.
DustThroughaFan
Well-Known Member
I always said if I built a quarter bore it would be a 257 Weatherby. The speeds y'all are posting is really making me want to do it again. What about a 257 weatherby AI ? I never have liked that double radius.
A past friend of mine improved a couple of the big Weatherby cases and man did they come alive.
A past friend of mine improved a couple of the big Weatherby cases and man did they come alive.
WYO300RUM
Well-Known Member
257x300 Weatherby. Why not ?
del2les
Well-Known Member
A few decades ago, I did a 25-7mmRM, so I did not have to deal with the double radius shoulder. Like you, I did not care for that shoulder profile, and I had a plentiful supply and free sources for 7mmRM brass.
WYO300RUM
Well-Known Member
I always sized my 7 rem mag on shoulder. I'm confused with the 257 Weatherby. My first radius shoulder cartridge. Do I size to belt or try to do to radiused shoulder ?
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