.243 Win questions

[Bill114]

I have a Mossberg SSi One in .243 Win. My dad used it for years for groundhog hunting, and had some federal 100gr factory loads. I put a box through it last weekend, and after choking on the buck-a-shot ammo with mixed success, I decided to reload for it. I'm certain it has a lot of accuracy potential with lower cost. I'd pay a buck a shot if it puts them all in the same hole. I also have lots of once fired brass from the same gun.

Does anyone have powder/bullet and weight suggestions? I'll be mainly doing 100 yd range shooting, and up to 300 yd varmint hunting. The 100gr bullets are probably too heavy, but I don't know how low to go. I have a lot of Win 760, but am open to Varget and H335.

He quit using this gun when I started loading 55gr V-max for his .223. The hog population collapsed from his efforts... I'd like to start with V-max bullets unless convinced otherwise. Eld-x is also an option.

Thanks!

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[Flyeralan]

Bill, do you know what twist the gun is? I am a long time shooter of the 243 and have used it both for varmint and still use it for PA whitetail. IMR 4350 has always been a go-to with this caliber for me. I have had a lot of accuracy success with my Win 70 with Sierra and Nosler bullets from 70 to 100 grains.

[JeffreyDeGraff]

For varmints I’ve had very good luck with 87gr vmax with w760. That load has accounted for many many prairie dog deaths out to 700 yards.


JTD

[Bill114]

Bill, do you know what twist the gun is? I am a long time shooter of the 243 and have used it both for varmint and still use it for PA whitetail. IMR 4350 has always been a go-to with this caliber for me. I have had a lot of accuracy success with my Win 70 with Sierra and Nosler bullets from 70 to 100 grains.

I'm trying to measure mine now. They say 1:10 to 1:8 is normal for .243.

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[Bill114]

I'm trying to measure mine now. They say 1:10 to 1:8 is normal for .243.

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From the best I can measure, it's a 1:10 barrel, which would favor lighter bullet weights...

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[JeffreyDeGraff]

From the best I can measure, it's a 1:10 barrel, which would favor lighter bullet weights...

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10 twist will handle up to 100gr hunting bullets.


JTD

[Bill114]

10 twist will handle up to 100gr hunting bullets.


JTD

How low can I go for varmints? 65 gr? 75 gr?

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[72Camaro]

I personally run 58 grain Vmax for my .243 varmint rounds and they click along with one load almost 3700fps and the other almost 3800fps using 4320 or H414, I do not remember which is which for velocity but they are very accurate.

[JeffreyDeGraff]

How low can I go for varmints? 65 gr? 75 gr?

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All the way down to 55gr.


JTD

[Bill114]

All the way down to 55gr.


JTD

Thank you!

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