Update: a 243 Remington SPS Varmint and 105's

[Niles Coyote]

Playing with Hornady’s 105 BTHP here lately. I am beginning to believe this bullet and my gun don’t like each other.

In load testing I will get a good group one moment and the next couple tenths sends it into a large 2-3 inch pattern and the good load is fine one time, then not the next. Either its and gun/bullet issue or being right at the edge of stability issue or both.

H1000 seems to show less of this than H4831sc so I think it’s more of a stability issue as that powder moves them along faster.


BTW, switching to mag primers gave me a 50FPS boost on my 105 load.

Old post, new life.

Shot 25 today (Hornady 105 BTHP) at 600, 700 and 1000 with my magnetospeed attached, using that and data from a kestrel then back checking on JBM for each shot logged... .240g7 is what matches.

On a side note I got this to work in my 9.125 twist Remington varmint. I had it dawn on me the other day that I had not cleaned the barrel of copper in a while if ever. I had been thinking that the rifle just didn’t like this bullet but then I found both the A-max and Berger VLD were also landing all over the place... Checked my cleaner that I thought also cleaned copper and alas it doesn't. So a little sweets to the rescue and bam, I am back to .4-.6 groups again.

So now I know about every 400 rounds this rifle is going to need a copper cleaning.

 

[stmcelroy]

Finally shot mine the other day out to 900 yards with the Hornady 105gr Match BTHP's. Didn't have much time to mess around with finding the best load, but was able to make hits on steel fairly consistently out to 900yds. Most of the problems were because of swirling winds, but i'm going to work on finding a load that is optimal for my barrel.

 

[Colcalcipherol]

SPS Stock

Got some 90gr sierra gk's and was wondering if anyone has tried these? Also picked up 100 105 amax's ,just need to get some h1000 to push em. Anyone tried to push these 105's out a little faster with 4350, or 4831 with any results? The 75gr Speer hps shoot sub moa over 43gr 4350 and the node seems to come back at around 46gr again, which I shot a .487" (almost identical with the 43 gr charge) but I figure why sacrifice velocity in a 243 with a 26" brrl.
I also saw a guy shooting the 105's and he told me that using retumbo, and h1000, he shoots with magnum primers which seems to aid accuracy quite a bit.
Let's keep this thread going with some great results like above, to all that have the 243 SPS and those who are getting one.
BTW, it's a must to toss the tupperware stock I think as we all have seen, and mine currently wears the BC A2 with hook just like N coyote above. Anymore development NC?

I was able to save my Rem700 SPS Stock (.243). I filled the forestock with epoxy, filled the butt stock with fiberglass resin then added six ounces of lead, milled out the bedding area almost completely, then pillar bedded. Worked very well.

 

[ValorHonorRespect]

Yeah 243 remington 43.1 grains .superformance shoots dimes also replace the trigger you won't regret it