Yes i am shooting at 100 yards to get a load, i have not scoped the barrel i been looking to buy one but money is tight right now. I had a 7 rem mag that i had no problem holding .5 to .750 5 shot groups consistently using berger vld's. Went through 300 rnds before deciding to sell to purchase a rifle that was cheaper to feed. I have tried every bullet length and powder combination 2 times. One day ill shoot a 1moa group the next week with same load will print a 4 moa group using the same ammo from the week prior. Action has been bedded and barrel fully floated with over 1/8 clearence from muzzle to action. Checked cold and warm. Forend has been completely filled with epoxy to stiffen up. Scope base, rings have been checked and torqued and locktight to spec. Scope is a swfa 10x42. The groups above from today are all the same powder charge. The same charge shot from the week prior that held 1 moa, thats the one 0.050 from the lands. This week it was a 2 or 2.5 moa group. Almost every group has mystery fliers for no apparent reason. Also taking advise from others on here i cleaned my bore squeaky clean and it didnt seem to help. Kept cleaning till there was no blue and clean bore. Actually tomorrow i will be heading back to the range again. Afterwards i put over 120 rounds through the barrel 20 Remington corelocks and 100 90gr eldx. Just am stumped and ready to give up on it.
From your above reply, it's looks like you've worked hard in trying to figure things out.
I don't see where you've tried different bullet weights though. I have a .243 that does not like 90 gr. but is real accurate with a heavier bullet, (105gr I think, but I'd have to check my notes).
I understand how the lack of funds can effect accuracy. I purchased a Lyman bore scope for under $200 a couple of years ago and consider it one of my better investments, gun wise. It can tell you so much about your guns, how well you clean them, wear, etc. Just don't get too carried away with what you find. In one of my better guns I found what looked like a huge cavity in the bore, but the gun shoots good, so I don't sweat it. As the gunsmiths say, "Let the bullet tell you what to do". Unfortunately, your gun is saying, "I don't like what you're doing!" But I think you have to take a look in your bore to see it looks. Ask around, maybe someone has one. If your a member of a gun club, put up a notice. There's a thread here on SH (perhaps in the gunsmithing section?), where a guy make a borescope real cheap from some parts he purchased on Amazon. Perhaps that's something that would work for you.
You roll your own ammo. How concentric is it? While I think I can make better ammo than I can buy, I realize I've introduce another variable to check if my groups go to crap. So check your handloading techniques.
Let someone else shoot it for groups. Maybe you've developed some bad habits-it can happen without you realizing it. The easiest way to find out if this has happened is make a dummy round and have someone else load the gun. If you've developed a flinch it will show up. Or take another rifle you have that is a known good shooter out and shoot it for groups. Every spring I start shooting with a .22rf to redevelope muscle memory. I have a few guns that have a strong recoil and after shooting them I go back to the .22rf to check if I've developed any bad habits. I realize a .243 isn't known for it's stout recoil, but bad habits can show up without you realizing it.
I live in Central Missouri, retired, and am always up for a road trip. If you live somewhat close to me, let me know.