Thread: 270 over penetration at close range?

So what temperature would it take to anneal copper?...I imagine it would be above the temperature to melt lead.

I've used 150gr partitions for a year now and all my animals have dropped on the spot except for a hind that took maybe 20 paces before she dropped but that was because I lung shot her. The partition is hard hitting and 90% of the time they're through and through shots even at the stags I've taken at 303 and 310yds. As it's ben said - it's all about shot placement. The partition does very little damage to meat as well which is a huge bonus. I've trialled quite an array of projectiles in different weights and they've all been successful but I wouldn't change my current setup - even though I still tutu with other pills

Never had my rounds go straight through, right shot placement and bullet selection should deal to that

so i have been thinking about this.
all the tests i have found on test media has been using the likes of wet newspaper, or balistic gel, the water making the media unable to compress and of course getting the infamous hydrostatic shock.
but lungs are full of air!
getting all myth busters, i thaught if i get some deer skin, then a layer of mussle. i was thinking of using the stomach wall as this is a similar thickness to the mussle inbetween the ribs.
if i then get a sheeps lungs and heart, inflate the lungs, then i wrap the lungs and heart in the stomach wall mussle, then around the outside i have a layer of the deer skin.
that would be a perfect test media for the classic heart lung shot where no rib or shoulder bones were encountered. a worst case senario for bullet performance on a deer.
i would make say 12 of these test targets, behind the targets if i put plastic buckets filled with water to capture the bullet.
i could shoot say 6 at 2 mtrs then 6 at 250 mtrs and compare the results.
then i realised that i couldnt be fucked proving to a retard that they are retarded. whats the point? i know full well it will blow up leaving a massive wound channel and exit into the buckets.
best i just nod and smile and agree that they should trade their .270 in and get a .308 that will fix all therir problems.
greg

Originally Posted by greghud

I keep hearing this over and over, that at close range the .270 will just zip through a deer and leave a small exit hole.
the animal then running off and often being difficult or impossible to track.
most commonly the shooter tells me they don't believe the bullet opened up, that it acted like a fmj and drilled a .270 sized exit. because it was going too quick.
they will also say that the same ammo at 200mtrs will flatten a deer no problem, so the common belief is the excessive speed is the reason.
now for me this go's against all the research I have done on ballistics, where a bullet at excessive speed seems to over expand and lack penetration. often breaking apart.
when I question the shooter it is most commonly the 130g factory ammo in standard cup and core bullets. (fed blue box, Remington corloct, nosler bt's, hornady sst etc)
the reputation for ballistic tipped bullets is probably the worst, (nosler, sst etc)
this problem dose not seem to happen in the 7mm range of calibre's even though they have very similar diameter, weights and velocities.
I have not used the .270 extensively so I cannot comment personally but I would appreciate any comments on this phenomena
cheers
greg

Bullshit

Originally Posted by greghud

so i have been thinking about this.
all the tests i have found on test media has been using the likes of wet newspaper, or balistic gel, the water making the media unable to compress and of course getting the infamous hydrostatic shock.
but lungs are full of air!
getting all myth busters, i thaught if i get some deer skin, then a layer of mussle. i was thinking of using the stomach wall as this is a similar thickness to the mussle inbetween the ribs.
if i then get a sheeps lungs and heart, inflate the lungs, then i wrap the lungs and heart in the stomach wall mussle, then around the outside i have a layer of the deer skin.
that would be a perfect test media for the classic heart lung shot where no rib or shoulder bones were encountered. a worst case senario for bullet performance on a deer.
i would make say 12 of these test targets, behind the targets if i put plastic buckets filled with water to capture the bullet.
i could shoot say 6 at 2 mtrs then 6 at 250 mtrs and compare the results.
then i realised that i couldnt be fucked proving to a retard that they are retarded. whats the point? i know full well it will blow up leaving a massive wound channel and exit into the buckets.
best i just nod and smile and agree that they should trade their .270 in and get a .308 that will fix all therir problems.
greg

If you can't kill a deer cleanly with a 270 using a 308 isn't going to help.

My first deer (well antelope actually!) was an impala ram, about the size of a fallow deer.

I shot it high in the centre of the chest (it was facing me) at about 25 yards with a 150gr hornady interlock from a .270.
Needless to say it collapsed where it stood. First impressions were that there was no exit wound until we started carrying it, blood started oozing from an almost invisible hole just behind its shoulderblades, i commented to my father and he agreed at the time that the bullet must not have expanded, until we started butchering it!
The wound channel was massive, 8 inches of the spine were splinters (further adding to the damage) and we had to throw away nearly all of the shouders and neck as they were just a bloodshot gelatenous mass. We found anshit load of fragments of the bullet and we surmised that only a small bit, possibly the base of the bullet below the interlock had exited after shedding most of its weight.

What i am getting at is that if, like a lot of hunters, we had just removed the back straps we could have come away thinking that the bullet had not expanded at all when in fact it had over expanded and shed most of its mass only leaving a small fragment to exit.

No problem with Norma 110 BT going straight through if you hit the right , this is a 50 yd Muntjac

Originally Posted by Taff

No problem with Norma 110 BT going straight through if you hit the right , this is a 50 yd Muntjac
Attachment 30976

I guess that was...... terminal?

Originally Posted by Taff

No problem with Norma 110 BT going straight through if you hit the right , this is a 50 yd Muntjac
Attachment 30976

Taff that is what we would call a well munted jac

try hand loads with 47 grns 2208 and 130gn sierra soft point boat tail bullets just under 2800ft sec. in 10 years have only double shot one animal. these projectile open very well and drop game at over 400 meters.

25+ years using .270
shot all but 3 of N.Z.s game animals with it
pencil through at close range without opening= didn't hit bone AT ALL
aim to break one or better still both shoulders...you cant drive far without front wheels
Ive had bullets fly to pieces at close range..but pushing a 110 grn varmit pill into wee fallows shoulder was maybe asking a bit much...didn't go anywhere but.
go too high and hit "the void" and no calibre is going to help you much..... well .50BMG may do it.

Originally Posted by rogers.270

Never had my rounds go straight through, right shot placement and bullet selection should deal to that

+1 surely the above is spot on. A 270 is no good at close range is just a pure myth. Just like someone saying a 243 is no good for a bush rifle or using in the roar ..pure myth and utter nonsense.

I shot a bailed boar at point blank last year with a 270 130grain SP. Absolutely hammered him. Was like the 44Mag. It didn't pencil through. The 270 is a lot of grunt but is fine for all that use and swear by it.

I have shot plenty of impala ,blesbok, kudu ,warthog you name it. Every time on close range the bullet disintegrated rather than went straight through. Monolithic solids is a different story.