.243 subsonic and .270 subsonic
- Thread starter .243 t3
- Start date
What bullet are you using?
I'm not sure about dropping below the Trailboss recommended starting load. Maybe requires pistol powder after all to get subsonic.
Ah, so that's in the .243? Thought you were referring to .270.
Trailboss data indicates and 8gr starting load for .243 so crack on!
tackb
Well-Known Member
I've done a bit with subs in my 308 , couple of bits of advice
1, use a short bullet flat base round nose as they tend to stabilise better at subsonic velocitys in my experience and tbh a super slippery bullet is no advantage
2, trailboss is the way forward , I tried various powders and managed it but trailboss is easiest !
3, be aware of richochets
4, develop the load without your mod fitted and ensure you are getting no yaw by checking the target before you try with your mod on , this will save unstable bullets from fouling your baffles.
have fun !
1, use a short bullet flat base round nose as they tend to stabilise better at subsonic velocitys in my experience and tbh a super slippery bullet is no advantage
2, trailboss is the way forward , I tried various powders and managed it but trailboss is easiest !
3, be aware of richochets
4, develop the load without your mod fitted and ensure you are getting no yaw by checking the target before you try with your mod on , this will save unstable bullets from fouling your baffles.
have fun !
tackb
Well-Known Member
I didn't notice any difference
With the .270 you could have trouble stabilising 150 gr bullets at subsonic velocity, with my 7mm08 Sako 75 I shoot a 160 gr cast bullet my normal load is doing 1600fps when I drop to subsonic
speed the bullets are starting to yaw at 50 metres,
I would recommend using varmint bullets Hornady make 110 gr Vmax and 110 gr HP if you are only shooting small animals they should be adequate
speed the bullets are starting to yaw at 50 metres,
I would recommend using varmint bullets Hornady make 110 gr Vmax and 110 gr HP if you are only shooting small animals they should be adequate
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