.243 Win - short bbl data

[thomis]

I'm loading for the Mohawk 600. I called Remington and they told me the twist rate for this rifle (built in 1968) is 1:9 1/8"
First can someone suggest the right powder for this shorter-than-average bbl (18")? I'm looking for a slower burn rate powder, correct?
I'm loading 85, 87, 95 and 100 grain bullets and I have H4895 and IMR 4064 on hand.
I'm interested in seeing your data for this short bbl

Thanks much!

~thomis

 

[243winxb]

Remington Mohawk 600-243 win.

My Mohawk- IMR 4350 (Dupont)-42 gr-85gr Sierra hpbt #1530- Rem. 9 1/2 primer- 2680 fps average. Your IMR 4064 should do OK. I am thinking the Barrel twist is 1-10", could be wrong?? Recall > http://www.remington.com/pages/news-and-resources/safety-center/safety-modification-program/remington-model-600-and-660.aspx

 

[thomis]

Yup, I sent the rifle to them a couple years back. They fixed the trigger assembly. I just called the 800 # an hour ago and 1:9 1/8" is what they told me. I have to assume they are correct.
Thanks for sharing your load data!

 

[rcmodel]

Powder selection is not based on barrel length.

Whatever powder in your load manual that gives the highest velocity in a long barrel will also give the highest velocity in a short barrel.

Either 4895 or 4064 are about equal, and good choices with your lighter bullets.

Both are a little fast burning for your heavier bullets but will work, if giving slightly lower velocity then slower powders.

On the other hand, they will give less muzzle blast in your short barrel then slower powders, which isn't a bad thing.

I'd suggest you look at your reloading manuals and see if you can reach a happy medium powder with mid-weight bullets if you want to cover all the bullet weights.

rc

 

[243winxb]

Corrected the bullet number to 1530

 

[41 Mag]

If you have any on hand, I have also had great luck with any one of the 4350's as well in my .243's. It works best with the 95 and 100gr loads. Can't give much info on the lighter bullets as the only one I ever loaded was the 85gr Nosler Solid Base over a charge of H-380. It shot great averaging 1/2" or less at 100yds, and dropped many a whitetail for me.

 

[Strongbad]

Both of my 243's are carbines, the 788 shoots the 95 gr. SST's with H-4350 which I think is right about perfect for the 243. I've also used IMR-4320 but H-4350 gave me better results. The Model 7 prefers IMR-7828 with the same 95 SST's. 7828 is a bit slow for the 243 but it gets the job done. That said, I'd start with H-4350.