Loading longer will not increase your pressure. Loading shorter will increase it, but as long as you are following the reloading manual or the results of checking what OAL will run in the gun, you'll be fine. Start your charges low based on the published data and work your way up looking for indications of overpressure.

The Lyman 47th edition reloading handbook shows an OAL with a 140gr Hornady BTSP bullet as 3.335". With a Nosler BT 140gr bullet, I load to an OAL of 3.37, and with a Nosler Partition 140gr bullet, I load to 3.30. The bullet's shape will affect how long you can load it without hitting your rifling.

Rifle reloading is first about learning the techniques to load good accurate rounds, and then second learning what to feed the machine. It takes experimentation to gather enough data to determine what the gun likes to shoot and what bullets it likes to spit. My Rem 700 doesn't like H4350, but loves RL-19 and H4831. I shoot two reloaded rounds out of that rifle:

140gr Nosler BT
55gr of RL-19
3.37" OAL
Rem Brass
CCI LR primers
It benches these less than 1/2 MOA at 100 yds.

140 Nosler Partition
57.5gr of H4831
3.30 OAL
Rem Brass
CCI LR primer
It also benches these less than 1/2 MOA at 100 yds.

I have three sheets of data on experimental rounds, their results, and the actual targets to get to just these two rounds.

I suspect that 53.0gr of H4350 is close to a max charge. This is not where I would start my testing... Start lower and work your way up. Some bullets result in higher pressures with a lower powder charge due to the bullets sectional density. A Barnes bullet is solid copper and not as 'squishy' as a bullet with a lead core. It's going to take a little more to force the bullet down the barrel, therefore a little higher pressures. Everything I've read is it takes about a full gr less to get the same velocity with a solid copper bullet over a lead core of the same weight. This also means a little higher pressures with less powder. Start lower.

Every reload/rifle combo is going to have a sweet spot. It's going to favor a weight of bullet and a velocity range that it just likes. Some even seem to work better with one powder over another (mostly due to the velocity thing and case capacity). Don't expect an automatic home run by simply choosing a bullet, some powder, and putting it all together. It happens, but it's usually based off of previous knowledge from reloading that caliber for a specific manufactured rifle.