Thread: 300blk Loading Tips

Originally Posted by Beetroot

Are they the ones that used to be advertised on Trademe?
I can't see them there anymore.

yes...from Tokoroa.

Originally Posted by Flyblown

Robert’s 151gr .308 cal shot from a .308 subsonic round @1100fps.

Large nanny standing about 25m above me, facing away and browsing on steep ground facing uphill. In behind the ribcage low down, through the liver and across the vitals making a nice hole through the aorta and hilar, found in join between #1 offside rib and spine. DRT. Looking at the way it expanded, not too hard to imagine this cutting a nice hole as it spins. The hole through the arota was a thumb’s width. Massive internal bleeding - when I opened up the thoracic cavity a torrent of the stuff gushed out over my boots.



I can’t find my travel plug so can’t get my scales switched on to weigh it. It has shed a bit of weight but not a lot.

If you are using these bullets on goats and you want to drop them within a reasonable short distance, then it’s best not to shoot them in the traditional manner, standing broadside and through the front lungs. There’s not enough resistance on a goat to get these bullets to do the necessary work. So when broadside, the best target is the high shoulder with spine, lower neck or head. However as mentioned above if they are shot along the length of the torso then these bullets do a surprising amount of damage and goat will not go far.

Regarding accuracy, me and the wife were out a couple of nights ago shooting rabbits with the Browning BLR and these 151gr. I’ve put a Zeiss 3-9x on that rifle so we can judge holdover more accurately… we had no difficulty smoking rabbits out to 75m, the farthest bunny we saw. It is tremendous fun shooting rabbits with these bullets.

Great photos Flyblown, All the recovered bullets I have seen all expand like that; the ones given back to me have expanded to .400" at least, Friwi has shot doubles with them
a few times while culling goats, It is only the lack of shock that lets them down, They are better killers at speed push them to 1600fps makes a big improvement.

H110 I found really only likes fast supersonic loads with light bullets in the 110-120g range. I found it very inconsistent with heavier bullets and it's a powder that like in 357 Magnum, it likes to be loaded near max to work well.

Lil Gun works well in the mid range it seems. I use it a lot for 150g bullets.

CFE BLK goes well with heavier bullets and is probably ideal for subsonics.

I'm doing a lot of 300 Blackout stuff on my Youtube channel so feel free to check it out. Same user name. Right now in the middle of doing a series on 150g Hornady FMJs. Coming up I have a variety of bullets I'll be working with and doing video series on for 300 Blackout. Right now no plans for subsonics but open to doing videos on it if there is a demand for it.

208gr ELD-m and A-max are the most accurate in my 1:7 rifle , but not so cheap using ar2205 powder.

I bought the 151 gr hollow points on trademe. I'm going to try them in a 300 AAC too.

Originally Posted by tikka

208gr ELD-m and A-max are the most accurate in my 1:7 rifle , but not so cheap using ar2205 powder.

Thanks @tikka, what do you do regarding seating depth?
Have you had to do much playing around with seating depth?
Or do you just load to mag length and call it good.

Originally Posted by Beetroot

Thanks @tikka, what do you do regarding seating depth?
Have you had to do much playing around with seating depth?
Or do you just load to mag length and call it good.

It was the easiest get accurate in my rifle, COAL 2.262”

I tested the distance to lands with a few bullets i had lying around.
Seems like anything 150gr or less is going to be miles off the lands as they barely had any bearing surface in the case neck and were over mag length anyway.

Guess I'll start with mag length and then a safe seating seath depending on bearing surface.