i have HUNDREDS of 165 ABLR for my 7 twist 270Bee. using n570 its a BAD 3200FPS with a 27" barrel. 3.45" COAL, but i have many different COAL i use. my chamber is cut .600" long.
Cartridge : .270 Weath. Mag.
Bullet : .277, 165, Nosler Accubond LR
Useable Case Capaci...
the recoil is so low as to ignore it even with HOT 175TGK.
with 150ABLR and 165ABLR, i don't notice recoil. i'm used to getting ROCKED by 235gr 375 Taylor loads at 2900fps.
it seems to be a shame that the 270 Bee didn't have a 1:8 twist with 7mm MAG murdering HIGH BC 165 to 175 bullets.
i...
even without freebore, pressures lower when you give even a small jump to the lands. it lowers accuracy, but also lower 'early' pressures. HOWEVER, shortening COAL raises compressive powder pressures. it is a balancing act and experience. BE CAREFUL PLEASE!
of course start with 10 percent below max and watch pressures. different cases matter. i use the best cases to avoid over pressures. norma, weatherby,etc cases. smith cases for my 460 smith mag, winchester for my 375 TAYLOr mag. remington for my 350 rem mag.
Cartridge : 6 mm Rem.
Bullet : .243, 70, Speer HP TNT 1206
Useable Case Capaci: 51.969 grain H2O = 3.374 cm³
Cartridge O.A.L. L6: 2.825 inch = 71.76 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 4064
Predicted data by increasing and decreasing the...
obviously i am doing 'out of the box' things with 270 weatherby.
i WISH i knew about 270bee decades ago, i would have know that its the best overall round there is.
of course the 7 twist barrels didnt exist a long time ago.
even with standard twist 270bee barrels, a lot can be achieved...
so....because i am loading 150ABLR, 165ABLR, 170AB, 170 EOL, 175TGK.... I ADDED 3lbs N570 because QL says its king in my long 270BEE.
Cartridge : .270 Weath. Mag.
Bullet : .277, 165, Nosler Accubond LR
Useable Case Capaci: 73.292 grain H2O = 4.759 cm³
Cartridge O.A.L. L6...
year old thread. i didnt see that when i replied. i WILL be running 150ablr, 165 ABLR, 170 tipped nosler, 170 EOL, 175 TGK.
my data will be kinda hot. i have .600" freebore and 3.50" COAL. with 3.500" i have .400" freebore.
i am already running 165 ABLR with 74 grains of retumbo. more data to...
I am up to 74 grains of retumbo behind 165ABLR 3150fps. Still no pressure signs. I have a few hundred 170 noslers I haven’t started loads for. I imagine retumbo will do fine for that too. I am in love with the rechamber to 270 fast twist weatherby.
one of my nicknames is ‘Big Bore Bill’ and i have lived that credo for 40+ years. I considered 9mm in a pistol and whimpy and ineffective for self defense. i lived by caliber plus velocity plus bullet placement equals longer range first shot kills.
caliber matters. As a result ANYTHING less...
So, the thread is not dead yet lol.
my gunsmith tried to rechamber the 270 to 270 weatherby, and his reamer pilot did not reach the rifling. My chamber has a .600” throat, so it takes a pilot that is longer. His reamer was more than 1” short.
I called my buds at pacific tool and gauge and...
so i got it installed.
the good news is, i have great baselines for the 175tgk.
the bad news is, there are no parameters for my chamber. its not a greek tragedy.
it was noted by another post that 24n41 pressure is pretty low. the other side of that is, if i use cci250 primers the pressure will...
just bought 4 lbs of retumbo. i'd like to find a load that will let me use magnum primers and 165,170,175 .277 bullets in my chambering.
faster than 24n41....... slightly.
graf and sons have new shipments.