Very good "Chooting" there.... i really like the 300gr D/C bullets! Ray

Pilgrim

This statement made me curious, so this morning i went up into the hills to see what 115g of BH would do in my X7 pushing the 300g Deep Curl. When i finished shooting it was 26 degrees. The elevation was some over 4600'. The primer was the W209. The clock was located at 10 yard. Three shots.

1896 fps
1902
1893

Shooter calculate the muzzle velocity at near 1928 fps.

That's rocking along pretty good Ron. How was the grouping?

I checked my X-7 file for velocity readings with other powders and found these with the chrono 15 ft. from the muzzle.

115 grains T7 FFG & 300 grain Gold Dot - 1710 fps (1" 3 shot group @ 100 yards)
105 grains T7 FFG & 300 grain Gold Dot - 1670 fps (2" 5 shot group @ 100 yards)
105 Pyrodex RS & 300 grain Gold Dot - 1548 fps (2.75" 5 shot group @ 100 yards)
95 grains T7 FFG & 300 grain Gold Dot - 1624 fps (3.2" 3 shot group @ 100 yards)
85 grains T7 FFG & 300 grain Gold Dot - 1575 fps (1.9" 3 shot group @ 100 yards)
75 grains T7 FFG & 300 grain Gold Dot - 1522 fps (1.4" 3 shot group @ 100 yards)

The group musta been OK; i didn't hit the machine or the sky screens, or the sky screen holders. You think?!?

What i did was shoot at 200 yard this morning, then i clocked 3 shots from the X7 without bothering to align the chronograph with the target. My 200 yard groups were terrible................; the best 5 shots were with the Triumph, and it was 4 1/4"; the X7 group was worse yet, as was the V2 5 shot group.

It appear that one or both of our clock isn't running so very good. It doesn't seem that your 777, and my BH209 speeds should be so different. The thinner air, and cooler temperatures wouldn't affect speed that much would it?

It seems i have read that parts or your country are below sea level, because of the dikes. If so, perhaps you are shooting under water, and that is what is slowing your bullets. 'Eh Pilgrim?!?!?!?

Ain't nowhere near underwater fella. My house is a half mile from the Mississippi River in an area called River Ridge, because the elevation is a FULL TWELVE FEET above sea level.

As for the velocity difference, I'm sure elevation has some effect but have no idea how much. But different barrels could easily account for the difference, as could components. Elevation at the range is somewhere around 225/250 feet. I used H5045SB sabots for all of those readings, and a TC U-View powder measure. Also, I'd bet the readings would be a little higher with T7 FFFG instead of FFG.

Terrible? Maybe for you. I'd settle for that at 200 with no complaints.

Well, my X7 likes to have the H15045BR shoved down his throat, so that could be a difference maker.

My load will just so barely fit into a U-View measure if the stem is pulled all the way; that there is another difference maker.

I had no idea you were so high there; imagine that a FULL TWELVE FEET. You won't have too much trouble acclimating to Batesland it seems.

Are you really sure you aren't shooting under water?!? Sometimes your musings seem it is possible you could be oxygen deprived.

How dare you sir! I ain't ever deprived my musings of anything, you can ask them yourself (and don't believe that lady from the Musings Protection Agency).

I wonder why the lower charges shot higher then the shots with more powder. I would of thought it would of been the opposite. I would stick with 95 load.

deer, the bullet's dwell time in the barrel is longer with a low velocity load. So the muzzle has risen slightly higher by the time the bullet exits.

It's always been my understanding that recoil does not occur untill the bullet leaves the barrel.