.270 vs. 6mm Rem for Pronghorn

[GSPV]

Do you, perchance, have access to a bore scope?

That would tell you what was going on inside your barrel. At 400 rounds, my first thought would be that it needs a really thorough cleaning.

 

[stacy]

Step up to a 243ACK or 6MM ACKLEY WITH 105gr or 108grs bullets and you see what 6mm bullets will do. It takes accuracy to kill at long distance just a much as it does bigger cal. bullets. I don't see 270s in any long range competition's where I shoot. IT'S NOT WHAT DRIVE IT'S WHERE YOU PARK THAT BULLET...............................

 

[eurobolt]

I have shot 270 many years ,some like ,some don't but I have shot Red, Roe, &Foxes etc ,with this caliber, recently I rebarreled My browning eurobolt B.A. from 20'' to 28'' fluted Border Stainless cut Barrel 1/9twist ,put it into a Richards Microfit Tactical stock,Pillar Bedded , I now reload with Nosler Accubond 140grn,Hodgdon 4813sc
which chrono's at 3,120fps,this is now an extremely accurate long range rifle due to a superb Border cut Barrel, not cheap but worth every penny.
I am sixty seven years old and still enjoy hill stalking a bit slower than I used to but I
would not be without my trusty 270, Shoot well & shoot straight.

 

[CaptainMal]

Have taken many deer with 6MM Rem. but way, way more with 270. Those are two of my three favorite cartridges (257 Roberts is my favorite).

Most 6mm kills were deer in the 200-300 yard range max. It's fine but not "lights out" like the 270. Now I do not and have never used "premium" bullets. I use regular 100 gr Hornady in 6mm and 140's in the 270. Regularly take 2 or more deer each year with the 270. Most are in the 200 - 500 yard range as I pass up shots too close for my interest.

Good friend in Pennsylvania does all his groundhog hunting with a 270. Has for decades and the hogs don't like it.

One gun - 270.

Been playing for the last few years with 6.5 AI, 7MM Mag and 338 Win Mag. They may have some prestige with the name but the deer still fall best with my 270.

 

[jerdebson]

I have shot a Ruger M77 in 270 Win for over 30 years. It is far from my most accurate rifle but it is the one I rely on most. I have shot Mule Deer from 50' to coyotes over 400 yards. I never had a shot present it self when hunting Elk but I have never felt under gunned with it and the old Redfield 6X transition scope. Lots of people have tried to buy it off me but its not for sale.

 

[eurobolt]

Hi this post has turned out to be very educational with every one who owns a 270,I have read all the posts and it shows me just how passionate you guys are about your shooting,as I have intimated, I have just rebarreled with a cut Border barrel and would like to show you a target I shot at 100yds with three rounds after setting up the Swarovski z6i Ballistic Turret scope & action to the stock,I worked on the Brass then the loads for the Nosler Accubond 140grns and the Ogive seated from the Lans ,I have always used 140grn heads they do better on Stags over here,good all round head.

 

[AckleymanII]

I started out in the 70's shooting antelope with about every caliber you can imagine. In those days, you went to Wyoming, bought two tags for our area, then bought 5 more doe tags. The whole darn bunch of us had tags for about 40+ antelope. We read all these articles on long range this and that, no one could hit a bull in the arss with a bass fiddle. I shot my antelope, found out that the only way I liked to eat them was in jerkey, so about 5 was all I could afford to have jerked...best jerky on the planet.

When you skin the breeches of a full grown antelope, there is not much left. So, you don't need a 375 H&H like one of our guys had, or 300 win mag like 3 others' had, nor 7 mags like I took for the first time. I went down to 30/06, then 270, then 25/06 and settled on the Sierra 90g BTHP at 3300 fps or a 6 Rem with a 95g Partition at 3150 fps. The 25/06 still blows them up quite a bit on 200 yd shots. The whole idea of "eating up to the hole" is a bunch of crap with many 270 loads because if you hit them in the shoulder, you will more than likely throw away the whole front half of the goat.

The 270 is a cannon on goats, but for most it will be just about right. I love the 110g bullets in the 270, they are all unreal accurate and at 3400 fps you can buck the wind for quite a ways. Accuracy with the 110's with 58g of Win 760 or 57-58g of R#17 is in the area of 3400 fps and H4350 is right in there also. Hornady 110g HP, Sierra 110g Pro hunter, and Barnes 110g Tipped triple shock simply shoot benchrest groups from a std Rem 700 sporter in a Wood stock that has been tweeked with tuned trigger, bedded, and freefloated barrel. Neck shots are easy with high powered scopes or watch their skull caps fly. The 110g Tipped triple shock will shoot a hole through a deer from any angle.

The last buck antelope that I killed was at 470 yards shot with a Rem 788 in 223 with a hand load of 26.5g of Win 748 with a 55g Winchester, lung shot, he flopped in his tracks. I did have a range finder with target knobs marked on my scope 6.5x20x scope. 22/250's with a 60g Sierra HP, max load of imr 4350 are preferable to larger calibers, but everyone has to find their own way. Picking up a goat from the processor can be a humbling experience, with nothing left of the animal but what fits in one plastic grocery bag...I don't eat horns.

You can shoot a lighter caliber, or go for the horns on a long 5 day hunt that just made me stupid on several occasions. My crowd along with the ranchers like to get some meat at the processor, then go back to the bar, eat a lousy steak, drink beer, and lie about how good look'en the ugly chicks are that come in the bar...now that is what we call fun!

First couple of days on a goat hunt, you can get close to them, after that, it helps to have a dune buggy with a quiet muffler.

The longest shot that I made on a goat was about 800 long steps with a 270 shooting a 140g Sierra BTSP with a max load of H4831. I misjudged the range to about 550 yards when it was actually 800 yards. I shot and saw the bullet hit way low, then the antelope dropped...I bet that happens a lot.

 

[Pablo]

I too am in a similar spot as the OP. I have a 270 model 70 mountain rifle that is great for Elk hunting but not quite accurate enough for long range Antelope shooting. I considered building another 260 AI, my son has one, but didn't really want two rifles in the same chambering around. So, I pretty much decided to build a 6.5 Sherman, which is a blown out 270 case with a sharp shoulder. It will run the 140 Berger Hunting VLD at a tick north of 3100 fps. Also planning to put a heavier barrel on this rifle, the beauty of this round is it will function perfectly out of the staggered mag on the rifle.

 

[TheOtherZilla]

While the 270 is a fine caliber [I own and shoot 2] IMO for the OP's spec's the 6mm is the better choice. In my case I'd go with the 243.. As someone else stated above the 6mm and 243 are so close that there is not enough difference to matter.. Unless you are set on a 6mm. 243 ammo, brass and bullets are plentiful. On PD's, or antelope a 243 is plenty. Deer too.. I have hunted antelope my entire life, and most always use a 243. 25-06 is another consideration.