Just thinking about working up a subsonic load for my Howa.......
Have of any of you guys tried a 208Amax and trail boss?
Not wanting to reinvent the wheel, so any load suggestions would be appreciated.
Cheers
Ps for hunting reds at about 50-100m
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Just thinking about working up a subsonic load for my Howa.......
Have of any of you guys tried a 208Amax and trail boss?
Not wanting to reinvent the wheel, so any load suggestions would be appreciated.
Cheers
Ps for hunting reds at about 50-100m
Have a look around the forum, I'm sure there is a recipe somewhere
Thanks, have done a search but didn't find much using a 208Amax
Do you have a chrony ?
Sent from my iPhone using Tapatalk
6.5grns works with cast 150grn........
ive been trying trailboss and 150 g cast, 8.5 grains gives 970 fps but only 2inch groups at 50 metres. Still trying but waiting for calm days
Excuse my lack of understanding, but why use cast bullets?
Hate to tell ya but the amax's and SMK s will have difficulty expanding at the subsonic speeds. Amax do most their damage being frangible and at higher speeds and will hit the expansion / frangibility wall pretty quick developing sub-sonic rounds.
I've never had great results on game with the 208s hornady package up for the whisper.
My go in the 300 Blk (same pill different parent cartridge) has been something with a wide impact area Meplat. Best was the Le high max expansions followed by the Barnes tac-TTSX but if you want a good easy to get round try the noslers ballistic tip or even Tnt's.
Just my 2c.
To try and get expansion.Quote:
Originally Posted by HOWA308
Just start with plenty of trail boss so that you are super sonic.
Then work backward 1 or 2 grains less each load until it goes quiet and you have it.
Work back up in 0.5 grins lots to see where it goes supersonic again just to double check and stay well back from that point.
Don't start low and work up or you might leave a projectile in the barrel !!!!!
Cheap and work well at sub sonic speeds.Quote:
Originally Posted by HOWA308
In my experience no normal hunting .308 bullet will expand at sub sonic speeds. They usually just punch a hole, if that is through the brain or spine the result is the same anyway.
Also you might find long pointy bullets don't stabilise out of a slow twist .308 barrel. This means any heavy long range low drag projectiles. Not sure what the limit for 208 gain A max projectiles is but less than 1:10 might be too slow and worse at sub sonic velocities. That's why 300AAC generally has a 1:8 or 1:7 twist barrel.
http://www.bergerbullets.com/twist-rate-calculator/
Doesn't look very stable even from 1:10 twist.
Bullet Parameters
BC0.648 G1
Caliber 0.308
Weight 208 grains
Length 1.533
Gun and Atmospheric Parameters
Muzzle Vel 900
Barrel Twist10 inches
Temperature 20
Your bullet is MARGINALLY STABLE.
Your bullet stability is marginal. You may shoot good groups under these conditions, but the BC of the bullet will not be optimized.
SG = 1.10
Bullet BC (G1):0.648
Adjusted BC for 1 in 10" Twist:0.570
Your BC is being compromised by:12%
Minimum Twist Recommended:1 in 8.50"
found at least one character online who claimed to get 1moa at 100yds using the 208 amax in a 1-10 using trailboss, others got good stability but crap groups . . give it a go you might be lucky
i put away a box of 208s & some trailboss awhile ago with the intention of seeing how far i could target shoot with them, the BC is a lot better than the 197grn flatpoint cast bullets i use . . be interested on how you get on.
have tried 212grn cast using 1-10 twist with good accuracy out to 300yds, slight tippping of the bullet ( oval holes ) so borderline stability with that weight/length of projectile, 1.5moa groups
if your going to go hunting with subs would suggest as others have said go with a BIG flatpoint, for best results go for a front on shot and try to take the pump out, bullet placement is everything. my 2c
good luck .. . R
A little instability can be a good thing as energy transfer is improved if the bullet tumbles, ive found that unless it hits bone even pure lead hardly expands, so i hollow point a lot of my cast pills for hunting now.( 3030 180 gr rn )Quote:
Originally Posted by rossi.45
Check out my listing on Trade Me #1251543112 The recovered bullet is from a Sika hind shot at 50 metres with a .308 doing 1050fps all recovered bullets look the same, the only jacketed bullet
that works as well is the Lehigh at a lot higher price, standard bullets need an impact velocity of 1800fps to expand even round nosed ones, at subsonic velocity high BC is not of any help at hunting
distances which are inside 100 metres with sub loads, accuracy only needs to be 2 MOA for 100 metres on goats pigs and deer.
Great info lads, much appreciated!
Just picked up some Trail Boss from the sooooo helpful chaps at Gun City Ak.......
Will work up some loads with my 168 Amax's first and see how she goes.
Thanks again for the replys.
Hey man l just checked out your cast bullets on trade me. Can I purchase some of them thanks?Quote:
Originally Posted by shooternz
Sure I am running a little low been a busy week how many do you want?
Yeah I'm keen for 20 if you have them. How much trail boss are you using for the 308 loads?
Will see how they go in the Howa, then maybe another 50 if they shoot ok.
No problem, 8.0 grs to 8.5grs in my .308's they are going 1040fps, Deposit $10.00 in my bank account 06 0996 0342499 00
and I will post to your address, TXT 02102724412.
Cheers
Robert.
Done, payment made.
Cheers Robert
Hey robert, have you managed to work on an expanding bullet heavier than 151gr yet? Think you said it was in the pipeline or am i confused
Can't find one I like, The 151 does everything I wanted and more a heavier bullet won't improve on the performance, Talking to a customer on Sunday who has shot over 20 Sika with them
reckons it's heavy enough none of the deer he has body shot goes more than 20 metres, I have other moulds higher on my wish list that I want to get first like a 7mm HP, every one it happy
with the 151 I have trouble keeping them in stock, thanks for the query,
if I find a heavier HP mould I will get if I have some spare cash, they rare most heavy 200 grain .30 cal moulds are
for high velocity longer range shooting not subsonic except for 300 BLK which are designed to feed in AR15's with 1:8" barrels.
big bro put some over chrony the other day....looks like 6.5grns would be around 1000fps for him...shorter barrel on Rossi could be the difference..
Hi Micky on your next order I will run them through the .311" size die see if that helps the accuracy, They drop out of the mould at .3105" may not matter at 1000fps but if you run them faster
it could,
i made some for a mate of mine, from memory i think it was 11gr of trailboss and a 220gr berger with the tip drilled out, used it on a few goats was quite good.
holy smoke Batman...thats what I call service!!!!!!Quote:
Originally Posted by shooternz
they going into just below 1" at 50 now....3 sheep with 3 head shots the other weekend all at 40-50 yards...... piece of cake when you have confidence in your load.
Tried some subsonic loads today with 150gn cast bullets, cheers shooternz!
Found 8gn of Trail Boss in my rifle went subsonic.
Sighted in at 50m, requiring + 5moa from my standard .308 load to get same poi.
Grouped about 1 inch at 50m........... Time to try them on the deer now!
Great, work the load up a little mine do 1/2" at 50 metres with 8.5 grs for 1040fps I haven't tried more powder yet as I don't hunt with the .308's they weigh 6.0 Kg
and have 26" and 30" barrels, hunting gun is a 9.3x62
A mans gun right there!!Quote:
Originally Posted by shooternz
that possibly explains why that load goes supersonic for mate in his Bakail and 6.5grns worked for my Bro..... shorter barrel will pokem out faster...a .22lr does the same thing,really short barrels need what are normally very slow loads to keep below speed of sound.Quote:
Originally Posted by shooternz