1) TSX like a bit of a jump to the lands vs cup and core. .05 is a good start. You did a good job and measured your rifle, use that data, not the published data which is meant for all rifles. If it fits in the magazine and feeds good to go.
Generally, If the bullet is jammed right into the lands it can cause the pressure in the case to spike, making for inconsistent results.
2) published load data varies from source to source, depending on how much the company's legal department made them water it down, and is made for all manner of rifle conditions, old, new, sloppy, etc.
Don't be afraid of max, just cautious. Your rifle is unlikely to blow up, that's usually caused by barrel obstruction or using pistol powder in a rifle. Tikkas are built solid.
LEarn what pressure signs are and how to look for them. First is usually the primer flattening out, then deep firing pin crater, then sticky bolt lift, then case failures. Look for pics online.
When I do load development I usually start 2 grains below published max, then go up in .5 grain increments to 2-3 grains over max.
E.g. loading 175 Nosler partitions in tikka 7rm nosler book max was 66, (quickloads data max was 68.1.) I loaded 64, 64.5,65,65.5etc to 68.0.
Accuracy was best at 67.5. Loaded that charge. Some primer flattening occurred.
Hope this helps with your reloading. Its a lot of fun, and satisfying when you see nice sub MOA groups in your choice bullet as a result of your work. Or a full freezer ��
