270/338
10-21-2014, 05:03 AM
#1
Giant Nontypical
Thread Starter
Join Date: Mar 2006
Location: ****ifornia
Posts: 5,052
270/338
Kicking around an idea...a 338 RUM necked down to 270 and then a double radius shoulder, weatherby style. My buddy just got a 270/26 Nosler reamer built, I might get this reamer done and send it to him to compare...
10-24-2014, 03:53 AM
#8
Typical Buck
Join Date: May 2009
Location: Colorado
Posts: 797
Jeep,
I have a 270 win getting built right now with a 29" barrel. The cool part is Matrix bullets have come out with a 270 bullet in 165 gr G1 .650 BC and 175gr G1 .680 BC. I wish they had a G7 listing but they don't. I have some 165gr Matrix bullets and they ran out of a 26" barrel at 2905fps with no pressure signs and a few grains of powder to spare. the 29" plus barrel will take it over 3000fps with the 165gr bullets. At 900 yards the 270 165gr bullet catches up to my 300 WM 165gr G1 .520 bullet in ft.lbs flying 3260. Nosler makes a 150 gr 270 bullet that breaks G1 .600 I may go that route and pump up the fps. Sorry for all the G1 numbers but its easier to compare. http://www.matrixballistics.com/.277...e-bullets.html
The reason I picked the 270 win in a long barrel was it has enough to do what I want out to a mile. The wind drift of the .277 in a 165gr is going to be a sweety. Compare them to other calibers and it takes a lot more weight to equal the BC.
Anyway I think the .277 is about to take a whole new turn into long range and it's about time. I'm days away from having it done and it's taken almost half a year so I'm excited.
My opinion about a 270 wildcat in a large case capacity would be go with the 7 STW case or 300 WM case. Weatherby's would have a lot of pressure in a long barrel and you would have more chance of maximizing the potential of powder and fps out of the prior two cases. If you could take the 175gr .277 to above 3200 fps it would be just amazing. That's pushing the extreme but that's why we play.
If you want to wait in a few weeks I'll have some numbers out of the regular 270 win you can compare and see if larger case or maybe even a 270 weatherby or 270 wsm would be enough gain for what you want.
I have a 270 win getting built right now with a 29" barrel. The cool part is Matrix bullets have come out with a 270 bullet in 165 gr G1 .650 BC and 175gr G1 .680 BC. I wish they had a G7 listing but they don't. I have some 165gr Matrix bullets and they ran out of a 26" barrel at 2905fps with no pressure signs and a few grains of powder to spare. the 29" plus barrel will take it over 3000fps with the 165gr bullets. At 900 yards the 270 165gr bullet catches up to my 300 WM 165gr G1 .520 bullet in ft.lbs flying 3260. Nosler makes a 150 gr 270 bullet that breaks G1 .600 I may go that route and pump up the fps. Sorry for all the G1 numbers but its easier to compare. http://www.matrixballistics.com/.277...e-bullets.html
The reason I picked the 270 win in a long barrel was it has enough to do what I want out to a mile. The wind drift of the .277 in a 165gr is going to be a sweety. Compare them to other calibers and it takes a lot more weight to equal the BC.
Anyway I think the .277 is about to take a whole new turn into long range and it's about time. I'm days away from having it done and it's taken almost half a year so I'm excited.
My opinion about a 270 wildcat in a large case capacity would be go with the 7 STW case or 300 WM case. Weatherby's would have a lot of pressure in a long barrel and you would have more chance of maximizing the potential of powder and fps out of the prior two cases. If you could take the 175gr .277 to above 3200 fps it would be just amazing. That's pushing the extreme but that's why we play.
If you want to wait in a few weeks I'll have some numbers out of the regular 270 win you can compare and see if larger case or maybe even a 270 weatherby or 270 wsm would be enough gain for what you want.
10-24-2014, 05:33 AM
#9
Giant Nontypical
Thread Starter
Join Date: Mar 2006
Location: ****ifornia
Posts: 5,052
Those Matrix bullets are nice, I have some 165's right now. I also did a 270 WSM already, once I get the feeding issues straightened out I'll start getting her tuned in. I'm also going to rebarrel my 6.5/284 with a MRI barrel and chamber it in a regular 270 Win.
We are thinking bigger now, and with the 150gr ABLR it could be really sweet at 3500+
We are thinking bigger now, and with the 150gr ABLR it could be really sweet at 3500+
