Sierra 107 gr BTHP in 243

[Senior Citizen]

Anyone done any serious reloading for this round? Especially in a Remington 700 VLS with a 9.15:1 twist.

Seems like it is next to impossible to find any more Hornady 105 A-Max's, so I bought 500 Sierras 107 grainers 2 days ago.

Just looking for any info that might give me a better starting point than the "book".

thanks in advance,

SC

 

[lafayne]

I shot a M700 .243 for about 30 years then rebarreled it to 7mm-08. After quite a lot of shooting, I loaded nothing but 100 grain Sierras or 100 grain Noslers. After settling on IMR 4350, I used nothing else. I was never disappointed. There may be better powders now, but I will bet that 4350 is hard to beat with the 100-107 grain bullets.

 

[jason223]

I have used the sierra .243 107 in my old Remington 788 with 1/9 twist barrel. 22 inch barrel.

My load is "work up" if you try it...reloader 19 = 44 grains chronographed 2960 fps...win brass and win large rifle primers.

Have not played with the 107 in years.

Go out and try some...let us know how they shoot.

Jason

 

[Homie]

The boxes I have say: 7" through 8" twist bbls. only.

Good shooting.

 

[H Richard]

Can't help with a 107 gr. but the Nosler 70 gr BT is great ahead of 42.0 gr. Varget. My long range Prairie Dog load.

 

[Bend]

The Nosler 105g Comp's are a great substitute for the A-Max's if the 107's don't work out.

Here are some starting loads from QuickLoad for the 107g (for a 26 in or longer barrel):

Ramshot Magnum - 47g
Reloder-25 - 44.5g
IMR 7828 SSC - 43.5g
Reloder-22 - 43.5g

 

[Senior Citizen]

Thanks for the info guys. I usually use 35 grains of 3031 with my Sierra 100 gr BTSP in my model 7 and model 70. Tickled to death they both eat the same recipe with amazing results. 3/8" CTC for 3 shot groups is pretty good out of an out of the box rifle with no trigger work I think. Have about 800 Speer 85 gr BTSP's loaded with 38.5 grains of 4064. They will group under 3" at 400 yards. I also use 45.5 grains of 7828 with my Hornady 105 A-Max's and they will shoot about 1/4" for 5 shot grps at 100. But I haven't been able to get any of them from any of the major suppliers in over 1 year. Always on back order. That's why I'm trying the 107's.

The above mentioned loads are loads I done a lot of shooting with (1000's of rounds). Never had any pressure signs or any blown up cases. But I recommend starting several grains below the listed powder weights and working up slowly. Do some finessing with the bullet seating as well. The 243 is such an easy cartridge to load for and gives very gratifying results.

shoot straight, or shoot often!
SC