Fishnhunt New Zealands main hunting and Fishing Forum. millions of posts on fishing and hunting, dogs, 4x4 vehicles, outdoors and much more Welcome, Guest. Please Login or Register
Page Index Toggle Pages: 1 Send TopicPrint
Normal Topic .243 subsonic (Read 1025 times)
Wildgame
Just Joined
*
Offline


I Love The FishNhunt Forum

Posts: 18
Location: GORE
Joined: Jul 8th, 2016
Gender: Male
.243 subsonic
Feb 11th, 2019 at 9:38pm
Print Post  
Hey team looking for some advice about getting some .243 subsonic loads made up. Im getting to the end of my Norma factory loads and have been saving up the brass to get some reloads made. My question is can a .243 be made subsonic and still have killing power for deer out to 100m? Ive heard you can have problems will the bullet not stabiliseing and killing power. My .243 is a 1:10 twist barrel which has been shortened right down the the stock which I guess wont help the situation. Through reading other forms Ive heard its possible with a heavy pill and trail boss powder. Any info would me mean as.
  
Back to top
 
IP Logged
 
JaSa
Full Member
***
Offline


Know your (rifles) limits

Posts: 303
Location: Waikato
Joined: Aug 7th, 2011
Gender: Male
Re: .243 subsonic
Reply #1 - Feb 11th, 2019 at 10:45pm
Print Post  
I can't answer most of your questions as I have only ever loaded a subsonic load for my 223. But according to some twist rate calculators the max weight is 75gr that your rifle will stabilize at 1020 fps. There is also a commercial subsonic load for a 243 out there that utilities the Sierra 75gr HPFB projectile - so I would probably start with that.
Hodgdon have a load on their website for a 100gr projectile with min of 8gr of Trail Boss. Obviously big difference between a 75gr projectile and 100gr. It hits the target at 50 yards tumbling so not great but on the other hand expected. Might take a chunk out of your silencer so be careful. But if you look HERE you will find the following instructions from IMR on how to come up with your own loads safely:

1.) Find where the base of the bullet to be loaded is located in the case and make a mark on the outside of the case at this location.  Then fill the case to that mark with Trail Boss, pour into the scale pan and weigh.  This is your maximum load.  Pressures will be below the maximum allowed for this cartridge and perfectly safe to use!
2.) Take 70% of this powder charge weight (multiply the maximum load from step 1 by .7), and that is your starting load.
3.) Start with this beginning load and work up to your maximum charge, all the while searching for the most accurate reduced load.  Once found, the fun begins!

No guarantee from my side. If it goes wrong don't complain !

Cheers,
JaSa
  
Back to top
 
IP Logged
 
Cigar
Full Member
***
Offline


New Zealand's Hunting
and Fishing Forum

Posts: 197
Location: Hamilton
Joined: Apr 17th, 2017
Gender: Male
Re: .243 subsonic
Reply #2 - Feb 11th, 2019 at 11:50pm
Print Post  
A lot of people/sources quote 1000 foot pounds of energy as a minimum for deer. A 100 grain projectile at subsonic velocity only has a quarter of that at the muzzle. Well placed head/neck shots will still drop them, but I wouldn't be trying shoulder shots.
  
Back to top
 
IP Logged
 
Flintlock
Donor Member
*****
Offline



Posts: 6385
Location: Blenheim
Joined: Oct 14th, 2007
Gender: Male
Re: .243 subsonic
Reply #3 - Feb 12th, 2019 at 12:01pm
Print Post  
Cigar wrote on Feb 11th, 2019 at 11:50pm:
A lot of people/sources quote 1000 foot pounds of energy as a minimum for deer. A 100 grain projectile at subsonic velocity only has a quarter of that at the muzzle. Well placed head/neck shots will still drop them, but I wouldn't be trying shoulder shots.

This is an American idea and when an American talks about deer he means Whitetail , which is easy to kill with relatively light loads, they have different muscle structure and proteins than the red type deer , and yet most States that allow rifles to be used on Whitetail have minimum caliber/energy requirements , as do most European countries .
If you are concerned about increasing energy levels in subsonic loads the best way is to go up in caliber and bullet weight .
  

Shooting is the most fun you can legally have with your clothes on .
Proverbs 12:27
The lazy do not roast any game, but the diligent feed on the riches of the hunt.
Back to top
 
IP Logged
 
headcase
Global Forum Guide
Donor Member
*****
Offline


Former Youngest Person
in the World

Posts: 26109
Location: Ponsenby
Joined: Jul 9th, 2007
Gender: Male
Re: .243 subsonic
Reply #4 - Feb 16th, 2019 at 10:11pm
Print Post  
So another way of looking at that is to say that subsonic loads are fine and good when you are close enough and sure enough in your accuracy and shootin ability to place the bullet inside a cup sized area, better smaller, at the top of the neck/right at the base of the ear. That will drop it like a sack of potatoes.
  

We either make ourselves miserable, or we make ourselves strong. The amount of work is the same.
Back to top
WWW  
IP Logged
 
Beaker
Forum Font
*****
Offline


very happy with my life

Posts: 1872
Location: Auckland NZ
Joined: Nov 12th, 2006
Gender: Male
Re: .243 subsonic
Reply #5 - Feb 24th, 2019 at 10:46am
Print Post  
Subsonic hunting seems akin to bow hunting, be very sure of accuracy and range and its fine. Be prepared to track blood trails and don't shoot and then rush forward wait just in case the animal is just quietly bleeding out on the spot.

I tried it with goats and didn't really get the point prefer to be more sure of an ethical kill. (notice I said more sure you can never be perfect)

Great fun for plinking though

  
Back to top
 
IP Logged
 
Micky Duck
Donor Member
*****
Offline


You shot it..You pluck
it

Posts: 7542
Location: Geraldine South Canterbury
Joined: Dec 6th, 2013
Gender: Male
Re: .243 subsonic
Reply #6 - Feb 24th, 2019 at 11:24am
Print Post  
my take on it......having tried it in 7.62x39mm it has its place..I have used it to sucessfully head shoot my own sheep for house muttons...of the dozen of so Ive done have run into issues with shot placement 3 times...bottom line if you dont directly hit brain or spine animal will shake its head and carry on...not a big issue for sheep in small paddock (unless you are the sheep Angry)  but a VERY big issue if a game animal out in the big wide world who can run away to die slowly of starvation etc..... its very much like the age old argument about if the .222 is enough gun for deer. IF you place shot correctly it surely is...if however you cockup the shot by rushing,animal moving,deflection,wind,excess range,moon in wrong quarter etc etc etc you run very real risk of a long tricky tracking job.
now for plinking,shooting bunnies,hares,possums,wallabies or finishing off animals subsonic loads are just the ducks nuts..... but then so would a reduced load going say 2000fps and would be NEARLY as quiet. so to answer your question YES IF EVERYTHING IS PERFECT....but its a hell of a lot of work for something that is vastly inferior to a normal load....the EBRG/twofor free does its best work at speed,why buy a farrari testicleroaster and hook concrete mixer on the back to go buy the groceries???
  
Back to top
 
IP Logged
 
Krico
Forum Font
*****
Offline


I Love The FishNhunt Forum

Posts: 1671
Location: Wairarapa
Joined: Oct 4th, 2008
Gender: Male
Re: .243 subsonic
Reply #7 - Feb 24th, 2019 at 12:03pm
Print Post  
Micky Duck wrote on Feb 24th, 2019 at 11:24am:
my take on it......having tried it in 7.62x39mm it has its place..I have used it to sucessfully head shoot my own sheep for house muttons...of the dozen of so Ive done have run into issues with shot placement 3 times...bottom line if you dont directly hit brain or spine animal will shake its head and carry on...not a big issue for sheep in small paddock (unless you are the sheep Angry) but a VERY big issue if a game animal out in the big wide world who can run away to die slowly of starvation etc..... its very much like the age old argument about if the .222 is enough gun for deer. IF you place shot correctly it surely is...if however you cockup the shot by rushing,animal moving,deflection,wind,excess range,moon in wrong quarter etc etc etc you run very real risk of a long tricky tracking job.
now for plinking,shooting bunnies,hares,possums,wallabies or finishing off animals subsonic loads are just the ducks nuts..... but then so would a reduced load going say 2000fps and would be NEARLY as quiet. so to answer your question YES IF EVERYTHING IS PERFECT....but its a hell of a lot of work for something that is vastly inferior to a normal load....the EBRG/twofor free does its best work at speed,why buy a farrari testicleroaster and hook concrete mixer on the back to go buy the groceries???
  Grin Grin Grin
Totally endorse what MD has said here - I went down the subsonic road with .308 . . . never had a disappointing experience or one where an animal suffered . . . but as MD and others have said - placement is so exacting - get it wrong and you have injured an animal.
Ask yourself - why do you need to develop a subsonic load in a .243?
The 300 Blackout (and derivatives) were designed for subsonic and provide a larger margin for error (but still not a whole lot.
It's all about the demand for accuracy on shot placement.
  
Back to top
 
IP Logged
 
woody308
Just Joined
*
Offline


I Love The FishNhunt Forum

Posts: 32
Location: Blenheim
Joined: Mar 15th, 2013
Gender: Male
Re: .243 subsonic
Reply #8 - Feb 24th, 2019 at 12:26pm
Print Post  
A lot of us have probably played around down the sub-sonic path, Ive personally tried .223 and .308 subs to see how they go.Takes a bit of trial and error to get the right load.As others have said accurate shot placement becomes top priority.If you shoot where you're allowed to use standard .22 life is far easier.Shot my first deer 43 years ago with a .22, many more over the years.Lost 2 animals due to bad shot placement over the years,both with hi-power calibers.Again accuracy is the key.If you do go down the sub-sonic path it can be both fun and frustrating,good luck.
  
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1
Send TopicPrint
 

FishnHunt - New Zealands Famous Hunting and Fishing Forum Since 1995 » Powered by YaBB 2.6.11!
YaBB Forum Software © 2000-2019. All Rights Reserved.
Site Design By Alan Simmons - PRism and all rights are reserved from 1995 and onwards