BT Sniper
08-01-2016, 02:44 AM
Success!
This has been a long time in the making for me. To be able to shoot a bullet made from scrap brass out of my 50BMG not only successfully but accurately.
Well today a long journey has finally come to a successful ..... end? ..... no, not really.....a new beginning I think is more like it.
Today was the day to get out and try my 700 grain bullets made from scrap berdin primed 7.5x55 brass. The weather was cool at only 75 degrees and winds, while a bit more then I would like where somewhat steady at 10-15mph from right to left.
Here is the specs....
McBros single shot
36" Fedderson 15 twist barrel
RWS brass
RWS primer
RL-50 powder
BTSniper 700 grain flat base bullet with 6s ogive and .125 meplat made from 7.5x55 brass jacket
Load data and FPS shot at 200 yrds
230 grains = 2630 FPS with 46 ES went 2.42" (these where shots 3-6 of the day, year actually for me)
240 grains = 2760 FPS with 73 ES went 1.84"
250 grains = 2812 FPS with 11 ES went 1.02" AT 200 YARDS!!! .5 MOA from a bullet made from scrap brass!
255 grains = 2895 FPS with 18 ES went 1.62" with very little vertical spread
260 grains = 2940 FPS with 33 ES went 3.36" Pretty sure I pulled the last shot.
Here are some pics....
http://i.imgur.com/tEwjh4ll.jpg
The 700 grain bullet next to the 7.5x55 case
http://i.imgur.com/FfTP279l.jpg
1" group at 200 yrds!
http://i.imgur.com/b19gsRAl.jpg
Very little vertical spread, could have been the wind that accounted for the horizontal?
A couple questions, or interesting observations that came up.....
1. I got a jump of around 85fps from 250 to 255 grains (a 5 grain increase) yet only a jump of 52 fps from 240 grains to 250 (a 10 grain increase)? Any ideas as to why?
2. The minimal vertical spread with the 255 grain load looks pretty good yet the 250 grain load was a smaller group. Which one would you pick for 1,000 yrd shooting?
and last... these bullets surprised me in the best way. They shot nearly as good as any other bullet I have made or purchased. I was very pleased with the accuracy. I didn't have any other bullet with me to use for a control but still I was quite pleased that all bullets exited the barrel in one piece and in the same direction as the barrel was pointing. Granted I have shot sub one inch groups at twice this distance with the Lehigh 170s but for bullets made from scrap brass I was very happy.
I did get a chance to bust some rocks on the other side of the canyon at 1000 yrds and took video of the5 shots I made with these same bullets. The results where also just as impressive. I'll post a link to the video as soon as I get it all together.
It was pretty awesome getting results like this, now to get my hands on more scrap Swiss 7.5x55 brass. Let me know if any of you have or find any :)
Good shooting and swage on!
Brian
This has been a long time in the making for me. To be able to shoot a bullet made from scrap brass out of my 50BMG not only successfully but accurately.
Well today a long journey has finally come to a successful ..... end? ..... no, not really.....a new beginning I think is more like it.
Today was the day to get out and try my 700 grain bullets made from scrap berdin primed 7.5x55 brass. The weather was cool at only 75 degrees and winds, while a bit more then I would like where somewhat steady at 10-15mph from right to left.
Here is the specs....
McBros single shot
36" Fedderson 15 twist barrel
RWS brass
RWS primer
RL-50 powder
BTSniper 700 grain flat base bullet with 6s ogive and .125 meplat made from 7.5x55 brass jacket
Load data and FPS shot at 200 yrds
230 grains = 2630 FPS with 46 ES went 2.42" (these where shots 3-6 of the day, year actually for me)
240 grains = 2760 FPS with 73 ES went 1.84"
250 grains = 2812 FPS with 11 ES went 1.02" AT 200 YARDS!!! .5 MOA from a bullet made from scrap brass!
255 grains = 2895 FPS with 18 ES went 1.62" with very little vertical spread
260 grains = 2940 FPS with 33 ES went 3.36" Pretty sure I pulled the last shot.
Here are some pics....
http://i.imgur.com/tEwjh4ll.jpg
The 700 grain bullet next to the 7.5x55 case
http://i.imgur.com/FfTP279l.jpg
1" group at 200 yrds!
http://i.imgur.com/b19gsRAl.jpg
Very little vertical spread, could have been the wind that accounted for the horizontal?
A couple questions, or interesting observations that came up.....
1. I got a jump of around 85fps from 250 to 255 grains (a 5 grain increase) yet only a jump of 52 fps from 240 grains to 250 (a 10 grain increase)? Any ideas as to why?
2. The minimal vertical spread with the 255 grain load looks pretty good yet the 250 grain load was a smaller group. Which one would you pick for 1,000 yrd shooting?
and last... these bullets surprised me in the best way. They shot nearly as good as any other bullet I have made or purchased. I was very pleased with the accuracy. I didn't have any other bullet with me to use for a control but still I was quite pleased that all bullets exited the barrel in one piece and in the same direction as the barrel was pointing. Granted I have shot sub one inch groups at twice this distance with the Lehigh 170s but for bullets made from scrap brass I was very happy.
I did get a chance to bust some rocks on the other side of the canyon at 1000 yrds and took video of the5 shots I made with these same bullets. The results where also just as impressive. I'll post a link to the video as soon as I get it all together.
It was pretty awesome getting results like this, now to get my hands on more scrap Swiss 7.5x55 brass. Let me know if any of you have or find any :)
Good shooting and swage on!
Brian