Bullet Weight For .243


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joed
January 9, 2013, 08:27 PM
If the weather holds this weekend I may get a chance to try out the .243, probably a big if this time of year.

But to the question at hand. This is a Winchester Featherweight with 22" barrel with 1-10 twist. The only ammo I could find was 100 gr Winchester. Is 100 gr to heavy for the twist? I'm seeing conflicting answers.

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bpl
January 9, 2013, 08:39 PM
100gr .243 is the most common bullet weight for deer by far, so I'd think it would shoot it just fine.

drhenzler
January 9, 2013, 08:45 PM
Yes for your 243 to really perform, you must give up on the 100 grain bullet weight unless you are willing to sacrifice accuracy. Not to say that they won't group in under an inch... but they won't go in the same hole.

I have just revisited this whole argument as I recently purchased another Sako Forester which comes with a 1:10 twist. I:9 is required to stabilize the 100 and 105's

My best groups to date are with a 75gr Nosler on top of 45gr of 4350. Seated to a OAL of 2.645". Some books will say the optimum weight is 87 grains, and as luck would have it Hornady makes such an animal. http://cheaperthandirt.com has some great prices on bullets. You should be able to get them for under $20/box.

I haven't loaded any 87's before, but will try to find a load using a ball powder as it meters very accurately without necessity of weighing every charge.

Attached is my wife's group with the 243. After she saw how good she was doing she got nervous and blew the last two shots.

dhenzler@sonic.net

joed
January 9, 2013, 08:57 PM
drhenzler, that's about what I figured with the 100 gr, kind of iffy. Maybe I'll just shoot them as a breakin.

Funny to hear about the 75 gr bullet being the best shooter because that was what I figrured would be the best performer based on the .25-06 I own. Unfortunately I couldn't get that bullet as they are $30 for a box locally. I ended up with 85 gr Sierra HPBT.

Skyshot
January 9, 2013, 08:59 PM
http://i1162.photobucket.com/albums/q525/Coreydane5/IMAGE_051-1.jpg I have to disagree with the above poster. 100 gr Sierra Gameking pushed by IMR7828 in a 1:10 twist factory Savage model 11

joed
January 9, 2013, 09:12 PM
I guess I'm back to square one Skyshot. The only thing I think I can do is try the 100 gr bullets. If they shoot fine, if not I move on. I still think the optimum bullet is between 70 and 80 gr for the .243.

browningguy
January 9, 2013, 09:21 PM
That should shoot fine in a 10 twist, I shoot an 8 twist but that's because I mostly shoot 107 SMK's or 115 DTAC's

Kachok
January 9, 2013, 09:36 PM
100gr is at the limit of a 243 1:10 some will shoot them just fine others need to back down to shorter 90-95gr bullets, depends on the rifle. Remember it is the length not the weight you have to stabilize, so flat base soft point 100gr bullets (like your Winchester PPs) are more likely to work then more streamlined poly tipped boat tail bullets of similar weight. Only one of my rifles shoots Winchester Power Points well, but that has less to do with the rifling twist and more to do with their QC I think. I tried them in my 30-06 and 308 with lackluster accuracy, they shoot 3/4" in my Tikka 6.5x55 but that rifle shoots everything well.

viking499
January 9, 2013, 09:57 PM
My 1:10 243 will shoot 100, 85 and 55 grain bullets the same. All under an inch, and pretty much all less than than and if I can do my part, some same holes.

So, I don't think you need to give up on the 100 grain idea. Just try it.

If all gun makers made the same caliber and used the same twist, not every gun would like the same brand or weight of ammo.

ole farmerbuck
January 9, 2013, 10:02 PM
I have used H380 and Hornady 75gr bthp with excellent groups in my Ruger lightweight barrel.

Abel
January 9, 2013, 10:07 PM
I would think that a 90gr would be perfect for deer. What are you going to hunt with it?

Coltdriver
January 9, 2013, 10:19 PM
I had created an 85 Grain Partition load for my .243 that would shoot into a dime at 100 yards.

I shot an antelope at 225 yards on the rangefinder and it ran 20 feet. Perfect boiler room shot.

The destructive power of that bullet was amazing. And I was able to get a 265 yard point blank range with that load.

Never tinkered with heavier bullets but always thought that the 100 or 100+ grain bullets would sure limit both the speed and the point blank range of the rifle.

Art Eatman
January 9, 2013, 10:54 PM
I've tagged a couple of dozen bucks via the Sierra 85-grain HPBT. Mostly neck shots. Cross-body heart/lung shots create a double-handful of mush.

wingman
January 9, 2013, 11:18 PM
What Art said 85gr sierra, all I ever used in the 243 simply amazing IMO.

joed
January 10, 2013, 05:47 AM
I would think that a 90gr would be perfect for deer. What are you going to hunt with it?
Planning on using this for coyote so I will be shooting lighter bullets once I get going.

Problem with this area is most of the stores never have what you want. When I bought the rifle I bought the only factory ammo the store carried, the 100 gr. Not carrying what you want is what got me started in reloading. And it's just as bad buying components here.

Abel
January 10, 2013, 07:16 AM
So, are you trying to save the pelt, or just kill yotes?

Sav .250
January 10, 2013, 07:29 AM
Fire away!

lovethosesooners
January 10, 2013, 08:45 AM
My Winchester Coyote Light has 1:10 and it's sighted in for cheap Federal Power Shock 100 grain-shoots under 1" and I buy them at Wal Mart for less than $16/box :)

stubbicatt
January 10, 2013, 09:10 AM
Good luck with yours. I have found a good load at 42.6 grains of IMR4350 and 87 grain Hornady Hollow Points. Sort of a middle ground load, but it shoots well and is devastating on Mr. Wile E. Coyote.

helotaxi
January 10, 2013, 08:14 PM
I've had very good luck with both the Nosler 80gn Ballistic Tip and the Sierra 80gn Blitz. Both are varmint bullets.

If you want an incredibly flat shooting bullet for coyotes, look at the super light bullets. 58gn Hornady Vmax can be driven to nearly 4,000fps and will exhibit less than 1mil of drop between a 100yd zero and 400yds. Wind drift is quite low. Using a 6" vital zone for a coyote, a 300yd zero gives you a point blank range of basically 350yds.

243winxb
January 10, 2013, 09:30 PM
I like this answer - Remember it is the length not the weight you have to stabilize, so flat base soft point 100gr bullets (like your Winchester PPs) are more likely to work then more streamlined poly tipped boat tail bullets of similar weight.

HighExpert
January 10, 2013, 10:16 PM
I shoot Hornady Light Magnums in 100gr out of my Weatherby which has 1 in 10 and it is a tack driver. I tried some 105s and they were a bit more scattered to say the least. I really think that 100s are about top of the limit. I also like some nice 80s in Winchester PowerLokt. They shoot well and are great for coyotes and other pests.

targetshooter22
January 11, 2013, 12:05 AM
I use both 100 grain bullets (Hornady SP, flat base, I think without checking the book), and 87 grain flat base "varmint bullets" in my CZ 550 that has a 1:10 twist. They use different powders, and have different POI's but they are both very accurate. FWIW, the 100's are intended for white tail, and the 87's for recreational shooting and pumpkins and such. Tons of fun, and work very well.

The lesson learned for me is just shoot the gun, and try some things out. Sure, the magic formula on the interwebs says 80-90 grains (about 87 being optimum), but it's hard to argue with the scoreboard.

RainDodger
January 11, 2013, 11:41 AM
Like drhenzler above, I also have a Sako Forester with a 1:10. I don't know if the data helps you or not, but I've found the "sweet" bullet for this rifle to be a 90 grain Berger HP Match boattail (#24425), with 36 grains of IMR-4064.

Unlike drhenzler, I ended up seating mine to a COL of 2.715" which (I think) is slightly over max recommended. I exchanged emails with Mr. Berger of Berger bullets and we were adjusting the seating depth in increments to reduce my group sizes. I don't know that they're all in one hole, but they're pretty close.

I'd say you should likely go to a lighter bullet also.

Kingcreek
January 11, 2013, 02:32 PM
My rifle, an early 70's model 70 featherweight, just loves the standard Winchester 100 gr SP.

Strongbad
January 11, 2013, 10:36 PM
FWIW I run 95 gr. SST's in two different 1:10 243's, both of them shoot under an inch all day long and they absolutely drop whitetail like a stone.

matt 7mm
January 11, 2013, 11:50 PM
my 243 is a rem 700 made in the early 90's i assume it is 1in10 but i am not sure. It shoots great with anything i have tried 55,75,87,95,100 for deer i like 95gr sst or 100gr partitions but for woodchucks or coyote i use whatever is handy.Its hard to find a load that isnt accurate in a 243

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