“The question is what extra step I can do to make the case chamber easily?”
I do not know what press you are using, I have presses, I have presses that I will not use when forming cases or sizing cases that have resistance to sizing, seems not all of my presses have the same ability to overcome case resistance to be sized. In the perfect world I would be using new or once fired cases, or cases I have annealed that have been annealed down to the point of case body/shoulder juncture below the new shoulder.
Understanding the press and measuring results before lowering the ram. Again, in the perfect world when sizing and forming the die contacts the shell holder when the press cams over??? Before lowering the ram, check the gap between the top of the shell holder and bottom of the die, Of the case won and had more resistance to sizing then the press, die and shell holder could overcome, the amount of case protruding between the die and shell holder will inform the reloader ‘by how much’.
Some reloaders, acting in an advisory capacity will recommend getting up from the reloading bench to get a flash light, around here when I need a flash light I am forced to find one, anyhow, I can not measure light width beams (or the width of a beam of light) in thousandths so I use a feeler gage, the companion tool to the press, about $11.00 for that gets down to .001 thousandths, if I can measure the gap between the bottom of the die and top of the shell holder I know the case is holding the die off the shell holder by that much in thousandths, and I can remove the shell holder before lowering the ram, then remove the die with the case protruding from the the bottom, then measure the case head protrusion, in the perfect world case head protrusion would be .125 thousandths.
if the case will not chamber, or allow the bolt to close, never, never, never force the bolt to close, it is never necessary and that technique is nothing but a bad habit, instead increase the ability of the press to overcome resistance by adding shims, spacers or leafs from a feeler gage between the deck of the shell holder and case head, an additional .012 thousandths can be added when using RCBS shell holders. Again, properly annealed cases, new or once fired cases should not be a problem when using a good lube and forming dies, again, I am the fan of forming dies, not often a reloader has the opportunity to use the ‘man tool’, the hack saw and finish with a file.
As I said there is 3’ = to 36 inches + to be trimmed when forming 100 30/06 cases to 7.65mm Argentine/BM Mauser, the hack saw makes short work of that task and the file makes it look like the reloader knows what they are doing. After forming and trimming the top of the case with a file the reloader/case former can lower the ram 1/4 inch then raise the ram again, then finish with the file again, could be roll over, could be caused by the case being compressed and relaxing when the die is lowered, who knows? I do not care, the length of my cases after forming are more consistent in length when I use this method.
The question was about “What can I do?” or “What must I do?” I have little to no use for a press than can not overcome the case’s ability to resist sizing, for those presses that have ability I have methods and or techniques to increase the presses ability, I have ways to determine if the press is winning or if the case is winning, again, this stuff does not lock me up, some of my methods could cause the weak to pass out and the strong to to get dizzy, and that makes it unsuitable for discussion on the WWW or Internet, as it pertains to forcing the bolt closed with a hammer.
F. Guffey