308 loading advice

Reloading equipment, methods, load data, powder and projectile information.

Re: 308 loading advice

Post by Sako 85 » 12 May 2019, 6:23 pm

Im not sure if i am measureing correctly. I was told to measure yhe extremes of the group then take off the bullet diameter to get a center to center measurment.
Is this the correct way to measure?
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Re: 308 loading advice

Post by Oldbloke » 12 May 2019, 6:42 pm

Yeh, should be center to center.
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Re: 308 loading advice

Post by SCJ429 » 12 May 2019, 6:47 pm

Yes it is correct to measure your groups this way, I was thinking that four 308 rounds side by side should be about 1.2 inches and take away 308 is about 0.9 of an inch.
Is the group horizontal or vertical? Was it a bit windy or if it is vertical the shooter may have induced this. I would like to see a couple of repeats of this charge.
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Re: 308 loading advice

Post by Sako 85 » 12 May 2019, 6:56 pm

43.5gr group is vertical it was windy as well though. I might load up a few of the best groups again and see if they repeat. I was abit curious as to why i got a good group at the start then opened up, then good in the middle then open up slightly and good just before i reached my max load which opened up again.
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Re: 308 loading advice

Post by SCJ429 » 12 May 2019, 7:10 pm

The groups from 42.5 to 43.5 are all promising. Make sure the same part of the fore end is sitting on the rest and don't move your head off the cheek piece if possible between shots. This may help with vertical.
Last edited by SCJ429 on 12 May 2019, 8:17 pm, edited 1 time in total.
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Re: 308 loading advice

Post by SCJ429 » 12 May 2019, 7:16 pm

Could you try 42.3, 42.6, 42.9, 43.2 and 43.5?
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Re: 308 loading advice

Post by Sako 85 » 12 May 2019, 7:31 pm

I will try that and re post the results. Thank you everyone for the advice
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Re: 308 loading advice

Post by Sako 85 » 12 May 2019, 7:50 pm

I will try that, i will try 42.5 and 43.5 again to see if they can repeat the groups. Otherwise i will try just higher and lower then each weight. If 42.5 or 43.5 are consistant i would be happy with that.
The wind was coming from almost directly behind and blowing to the left today
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Re: 308 loading advice

Post by Cal-ApeR » 14 May 2019, 8:34 pm

Mate, I wish my grouping was like that originally. You've got nothing to worry about. I'm keen to see what load you choose. In the end I settled with 45.5 2208, my particular rifle likes it. I've since stopped playing with loads on this rifle (getting costly) and am happy with how it groups with this load and the 150gr prohunter. Be sure to let us know how you go.
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