On my first tests my particular Rem 700C seems to like 150-grain Nosler Partitions with 56 grains of IMR 4831 for just under 3000 fps and cloverleaf groups at 50 yards.

hi i am reloading for my 270win i cannot get a group under 4 inchs useing 150 grain btips the seem to key hole on paper i have tryed n 160 n165,h-varget and norma 204 nothing seems to work what am i doing wrong .the rifle is a sako 691 with a olimpic arms barrel the 110 vmax are perfect and the 130 grain sst just the same i am limited to what powder i can get any help would be welcomed .

It's hard to beat the 4831's for a 270. Both IMR and Hodgen work well for me. I load mostely for 130gr but I'm sure you will find they will work for a 150gr as well.

simdow

Measure the twist on your barrel for us. Just pull a tight patch back and mark the rod on one revolution.

What do you mean that the 130 SST's are the same? Are they shooting good or like the 150's?

Sometimes you have to give up on a bullet. Those powders should work and the 150gr ballistic tip shoots very well in my brother's 270Win (Browning A-bolt). Your barrel must be of a twist that doesn't shoot the longer 150 grain bullet very well. Do you know the twist of your barrel? I think most 270's are 1:10 twist. You might try some other types of 150gr bullets if you're determined to shoot 150's. (Maybe a shorter 150 gr. bullet like a nosler partition will shoot?)

hi the 130 sst shoot very well i just got the 150 btips tryed 12 different loads will check the rate of twist and let you know thanks.

If you bullets are keyholing its not your powder charge, its your bullet or your barrel...Try different bullets and bullet weights and H4831 Powder in the .270....but I suspect you may need a new barrel...Most any .270 will shoot any 130 or 150 gr. bullet well enough...

I don't mess with touchy barrels, they go to the dump.Get a new Douglas or Lothar Walther, or sell the gun and start all over.

I agree about it not being the powder charge, it is the bullet. 75% of accuracy is the bullet anyways. btips are too fragile on game anyways. My 270 shoots the 130 interbond under MOA. so I don't use any other bullet. also get ahold of some 4831

A friend's Marlin 336A was shooting key holes. The problem lied with the barrel.

Polymer tip, Nosler BT or Hornady Interbond, are very accurate bullets. Interbonds are better for big game hunting.

Both H4381 and H4350 are very good powder for .270.

Cheers!

Danny Boy

I have found the 150 NBT to be one of the most accurate 270 bullets out there - same for the 130 NBT. In fact, when I buy a new rifle I judge its initial performance potential using NBT bullets. If you are keyholing then I would say you have a barrel/twist issue - standard twist rate for 270 is 1:10. The 150 NBT is a long bullet and I suspect your twist may be 1:12 - which is strange since I have never seen this before.

the rate of twist is 1in 10 we tryed several rounds today one hole groups with 100 grain speer hollow points around the same with vmax 110 grain 130 sst good group as well at 100 yards there cannot be to much wrong with my barrel .went out this evening shot a fox 183 yards its working just dont like the 150 btips???

I would suggest copying the lot number from the box of 150gr BT's and if you really want to try them again, make sure the next box is from a different lot#. I have heard tell of this once before, funny thing is that they too were BT's only in .338 cal. Somthing about a batch with jackets that were not even and somehow they got shipped out for sale.

Depending on their make (and length), my Pre-64 Win M70-FW .270 doesn't like 150 gr. boattail bullets either. The problem is the boattail---lengthens the bullet just enough to make my rifle's twist marginal or worse for good accuracy.



HOWEVER, with 150 gr. Nosler FB Partitions 53.0 grains of 4350 (2,724 fps 5-shot chrono ave., std. dev. 9.4), 55.0 grains of IMR 4831 (2,814 fps 5-shot chrono ave., std. dev. 29.8), and 56 grs. of H-4831 (chrono data not at hand), all will regularly shoot 3-shot groups under 1 MOA from my 22" light barrel.



Try the FB Nosler Partitions. The flat bases make the bullets just enough shorter they may shoot well in your rifle.



AC

i will try a few different loads tonight when i get home try and boost them up a bit the powder i have limites me all i have is n-160 n-165 trying to get some more types .

You aren't the only one having trouble shooting the 150 NBT. I am trying to work up a load right now, and have been through one box of bullets already and just can't get it under an inch. 140s shoot great. I am about to give up on the 150 NBT.

I AM NOT UP TO DATE ON MAXIMUM LOADS FOR A 270 Winchester.
My favorite load[s] were:
H-4831 58.0 grains for either 130 or 150 grain. Before Speer discontinued the 170 brush bullet I shot 56.0 grains.
I suggest you start low to middle of your book and work up.

I use 58grs of H-4831, or 58.5gr's of RL-22 with a 150gr both will exceed 3000fps in a 24" barrel. The RL-22 has been the most accurate load.

I have loaded 150 grain Btips and many other 150 grain bullets for SEVERAL 270s for several people. First, I have had excellent results using them on deer. Secondly, I have had better results with IMR4350 than with the 4831s or RL22 in these rifles. Not once have I finished on a load less accurate than 1"@100yds 5 shot groups. In fact, using 52 grains of 4350 with 150 grain hornady SP bullets gave me tiny groups (as small as .25" on good days) out of a used and very inexpensive savage. Start out at 50 grains of IMR4350 and work up to 52 (slightly higher than this if no pressure signs. I have had best accuracy between 51 and 52.5 grains depending on the rifle).

Do you have a bullet comparator? If not, I would advise getting one. My rifles have liked to be seated just barely off the lands, and bullet contour changes slightly from lot to lot, so you will nead to adjust your seating die for different lots, and if the seating plug does not contact the bullet low on the ogive then you will have to tweak each round. After finding an accurate weight of powder with your bullet vary seating depth till you find the most accurate load. Seating depth IS important. Also, make sure your sizing die is properly installed in the press.

I would advise against btips out of the 270 for elk by the way. 150 gr Partitions and the hornady interlock 150 grn bullets work well. 150 grain barnes are outstanding on elk (I have witnessed some serious penetration and damage on elk out of a 270 with that bullet) if your rifle will shoot them well. They seam to be more finicky to load for though. Have never had a problem loading partitions.