.243 win. What reamer

[Mt.Boy]

Getting ready to rebarrel a 243. Would like to shoot 95gr bullets up to maybe some 115. Gunsmith has a sammi reamer. Trying to decide if I would be better off to rent a 243 match reamer or go with the sammi reamer. Thanks for any advice.

 

[K22]

What shooting discipline?

For hunting I'd choose a 243 SAMMI reamer since I believe it will accommodate reloads and factory ammo better. The last thing you want in the field is functionality problems.

While capable, and l love the 243 Win, it would not be my first choice for a high-volume target cartridge due to barrel life issues unless changing barrels more often than some other more barrel friendly target cartridges is ok with you.

PS: I had one of my re-barreled a few years ago with a Hart barrel, standard reamer. Shoots lights out.

 

[Mt.Boy]

What shooting discipline?

For hunting I'd choose a 243 SAMMI reamer since I believe it will accommodate reloads and factory ammo better. The last thing you want in the field is functionality problems.

While capable, and l love the 243 Win, it would not be my first choice for a high-volume target cartridge due to barrel life issues unless changing barrels more often than some other more barrel friendly target cartridges is ok with you.

PS: I had one of my re-barreled a few years ago with a Hart barrel, standard reamer. Shoots lights out.

Thanks for the info. Thinking of using 95s up to 115 maybe. Mostly for hunting and some target shooting

 

[K22]

Thanks for the info. Thinking of using 95s up to 115 maybe. Mostly for hunting and some target shooting

For those bullet weights, check with your smith but an 8" twist might be the ticket.

 

[Mt.Boy]

For those bullet weights, check with your smith but an 8" twist might be the ticket.

Right. I was looking at a 1-8. Found a good deal on a 1-7.5 to.

 

[Mt.Boy]

Does anyone know the freebore on a sammi reamer

 

[rwj]

Does anyone know the freebore on a sammi reamer

Virtually zero. The 1 degree 30 minute leade taper starts at the end of the neck fillet.

 

[Mt.Boy]

If I go with a sammi chamber I will probably have a lot of bullet in the case correct ?? Thanks.

 

[rwj]

If I go with a sammi chamber I will probably have a lot of billy in the case correct ?? Thanks.

If you plan to shoot the heavier 105 - 115 grain (longer) bullets, yes.

 

[Mt.Boy]

If you plan to shoot the heavier 105 - 115 grain (longer) bullets, yes.

Ok thanks

 

[Edd]

Does anyone know the freebore on a sammi reamer

If compared to a .2435" diameter parallel freebore, the SAAMI reamer freebore will be about .050".

 

[Indiana6547]

I would suggest a 6 GT reamer with .120 freebore. Buy it here: https://www.gaprecision.net/6mm-gt-reamer-and-headspace-gauge-pacific-tool-and-gauge.html

My grandfather used to shoot a .243.

 

[Bill Norris]

Right. I was looking at a 1-8. Found a good deal on a 1-7.5 to.

I have 1 - 7.5 Twist barrel on my 243AI and it shoots lighter bullets all the way down to 55 gr. Nosler B T really well. Have had no issues period with lighter bullets however I am not trying to shoot the riflings out of the barrel with one trip.

 

[75vmax]

My reamer is 0 Freebore with. 2725 neck . I use throat cutter for the berger 105s 8 twist and leave it 0 for the 69s for the 12 twist

 

[75vmax]

My reamer is 0 Freebore with. 2725 neck . I use throat cutter for the berger 105s 8 twist and leave it 0 for the 69s for the 12 twist

Peterson brass requires no neck turning but lapua needs to be skimmed

 

[waverly]

JGS Saami spec 243 reamer print. Zero free bore. This is for hunting rifle.

Waverly

 

[Mt.Boy]

My reamer is 0 Freebore with. 2725 neck . I use throat cutter for the berger 105s 8 twist and leave it 0 for the 69s for the 12 twist

How much do you cut for the 105s.

 

[Eric Leonard]

I had a 243 done on a saami reamer and had the throat lengthened with a unithroater so a loaded round with a 105 vldh was 2.800 oal,
It was the funnest 900 rounds I ever had. Lol

 

[Idaho-Lefty]

I had a 243 done on a saami reamer and had the throat lengthened with a unithroater so a loaded round with a 105 vldh was 2.800 oal,
It was the funnest 900 rounds I ever had. Lol

HENCE WHY,.. I built, a 6 XC and, I expect, to get at LEAST, 2 Times that, amount of,.. Accurate, Shots
The .243 Win ( Unless just used as, a strictly, Hunting Rifle ),.. IS,.. Obsolete,.. IMO
IF, wanting to Shoot,.. Targets, Steel Plates and Varmints, too,.. personally, I'd Scrap the .243 Win "Idea" as they are "Hard" on, Barrels.
Sorry to, BE,.. Blunt and,.. Truthful

 

[Eric Leonard]

HENCE WHY,.. I built, a 6 XC and, I expect, to get at LEAST, 2 Times that, amount of,.. Accurate, Shots
The .243 Win ( Unless just used, as a strictly, Hunting Rifle ),.. IS,.. Obsolete,.. IMO
Sorry to, BE,.. Blunt and,.. Truthful

s

I agree but with the 105 vldh at 3300 fps it was so much fun to shoot I couldn’t help myself.