Thread: Down loading 243 win to 6x45 velocities

Originally Posted by Simon

Interesting thread.

My boys (7&9) are keen to shoot but my Ruger Ranch 223 with a 16” barrel is too noisy / jumpy for them, making them flinch.
Yes a suppressor would help and is on my list to purchase.

Researching reduced loads, I came up with 8.0 grains of Alliant Blue Dot behind a 55gn Rusa CMJ projectile which gives me 1800 fps. I have large amounts of these components on hand from other endeavours.
It’s quiet, accurate and using some hold over, hits on 6” steel plates out at 200 metres are reasonably easy.

Cheap shooting for an afternoon of fun.
About $0.25 cents a shot, so cheaper than some 22lr ammo currently.
Cases are cold to touch when ejected and the barrel hardly gets warm, even when shooting heaps of shots.

For those that are interested in reduced loads, Google “seafire 223 load”.
An interesting rabbit hole for a rainy day.


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I originally got my reduced load data using imr 4198 from 'seafire' too ;-)

I use 14gr of 4198 in 223 behind a 55gr and it shoots tiny groups at 2200 fps, my lad has shot that at 200 yards.

I see seafire now also recommends re7 for these type of youth loads