Painless load development (mine)

[jjohnsonElknewbie]

I think that would work.

An 18” 6.5-7 PRC shooting the 147 around 3000 would be a handy rig. I’m not sure if that charge and short barrel would play well with most suppressors though. If the OG 6.5 doesn’t have a barrel restriction, 22” overall barrel length suppressed would be awesome.

 

[Walker6]

Tested 109 LRHT’s in the SAAMI 6 creed with 42gr. H4350. 2.857 COAL. Or about .020 off.

They aren’t very far down in the case neck (bearing surface is maybe 1/2 way down), so I single fed 5 and then mag fed 5 to see if it would make any difference with dispersion from the bullets hitting the feed ramp and possibly getting a little runout. It didn’t affect anything.

Single fed
View attachment 1020544

Mag Fed
View attachment 1020545

10 shots overlayed into a .57 MOA group with an ES of 28.

View attachment 1020548

No actual load work, other than testing N555 as well, which didn’t shoot as small of groups but did have a lower ES. I’ll personally take the smaller groups vs. lower ES all day.

This is also a 26” carbon benchmark and the gun weighs 10lbs 4oz.

H, have you shot a critter with those 109 LRHT’s yet? I’ve got a 7 twist .243 that likes those and I’m curious how they perform on meat.

 

[huntnful]

H, have you shot a critter with those 109 LRHT’s yet? I’ve got a 7 twist .243 that likes those and I’m curious how they perform on meat.

I haven't yet. I killed a coues deer at 500 yards with the 144LRHT and it performed very well. So I know the bullet style is capable of nice wounds, just don't know if it's optimal for them.

 

[beerbucksducks]

My old load of h4350 and 95 NBT for my 243 shot like shit after bedding, floating the barrel, cutting to 18” and threading (it never shot great, about 2moa at 100 for 10 shots). It was now 2.5” plus at 100. After reading this thread and eliminating most of my case prep methods, I chose two top end loads from hodgdon’s website, one with staball 6.5 one with h414. I loaded 5 of each just to see if they showed promise. Staball shot better than the h4350 load but still 1.5” for 5 shots at 100. H414 put all 5 into .6” at 100. I loaded 10 more and shot the same target, putting all 15 shots into 1.5”. The load clocked 2880. It’s looking plenty good to me, so I’ll load up another batch and shoot some steel.
I appreciate this out look on reloading and avoiding the incremental changes. It was pretty obvious which load was going to shoot looking at the 5 shot groups side by side, only difference being the powder.


Sent from my iPhone using Tapatalk

 

[huntsd]

as in this case to seat the bullet so the boatail is at the shoulder/neck junction of the case.

@Formidilosus are you referring to the shank being in neck/shoulder junction? or just make sure any portion of the boattail is in the neck/shoulder junction?

ie would you be ok with the redline being at the neck shoulder junction or would you want green?

 

[Schmo]

@Formidilosus are you referring to the shank being in neck/shoulder junction? or just make sure any portion of the boattail is in the neck/shoulder junction?

ie would you be ok with the redline being at the neck shoulder junction or would you want green?
View attachment 1034600

I’m not Form, but the green is optimal. Other positions can still shoot really good however.

 

[wind gypsy]

I’m not Form, but the green is optimal. Other positions can still shoot really good however.

@huntsd I'll disagree with the above, red is optimal.

"Ideal" takes the following into account:
- Doesn't impede on powder capacity or have inconsistent seating resistance from powder compression
- Has enough support of the bullet by the neck
- Keeps bullet bearing surface forward of the "donut area" at neck/shoulder junction. "Donuts" are just a thickening of the neck near the shoulder junction that can occur in brass. Keeping the bearing surface forward of it can increase consistency of neck tension and concentricity.

You can have ammo that doesn't align with any of those 3 goals that shoots fantastic, but when people are setting up custom chambers for a given bullet for utmost precision, the above seating depth is typically intended outcome.

 

[Formidilosus]

@Formidilosus are you referring to the shank being in neck/shoulder junction? or just make sure any portion of the boattail is in the neck/shoulder junction?

ie would you be ok with the redline being at the neck shoulder junction or would you want green?
View attachment 1034600

I generally set it up so that the green line is barely above the neck/shoulder junction in the case. But it also doesn’t matter really if it is deeper. I generally, again against what most do; do not want the green line very far into the neck of the case.